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Polytetrafluoroethylene patents



      
           
This page is updated frequently with new Polytetrafluoroethylene-related patents. Subscribe to the Polytetrafluoroethylene RSS feed to automatically get the update: related Polytetrafluoroethylene RSS feeds.

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Date/App# patent app List of recent Polytetrafluoroethylene-related patents
04/10/14
20140100665
 Non-resorbable plugs patent thumbnailnew patent Non-resorbable plugs
A non-resorbable wound dressing can include a plug made from polytetrafluoroethylene (ptfe). The plug can have a three-dimensional shape.
04/10/14
20140096682
 Fluorinated surfactants and stabilization of polytetrafluoroethylene (ptfe) particles in hollow fiber spin solutions patent thumbnailnew patent Fluorinated surfactants and stabilization of polytetrafluoroethylene (ptfe) particles in hollow fiber spin solutions
Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide.
04/10/14
20140096334
 Paint applicator patent thumbnailnew patent Paint applicator
An applicator includes a cylindrical core having an interior surface and an exterior surface. A backing layer is attached to at least a portion of the exterior surface of the cylindrical core.
03/27/14
20140085601
 Contact lens having a chip integrated into a polymer substrate and method of manufacture patent thumbnailContact lens having a chip integrated into a polymer substrate and method of manufacture
Contact lenses and methods of manufacture are provided. In one aspect, a method includes: positioning components in predefined locations on a first surface; applying pressure on the components employing a second surface; providing molten material between the first surface and the second surface and around the components; embedding the components in a substrate by cooling the molten material and causing the molten material to harden, the substrate being a substantially solid form of molten material; and removing the first surface and the second surface after embedding the components in the substrate.
03/27/14
20140083929
 Microporous modified-polytetrafluoroethylene membrane, porous-modified-polytetrafluoroethylene-membrane composite and production process thereof, and separation membrane element patent thumbnailMicroporous modified-polytetrafluoroethylene membrane, porous-modified-polytetrafluoroethylene-membrane composite and production process thereof, and separation membrane element
The invention offers a microporous modified-polytetrafluoroethylene membrane that is a microporous membrane having a significantly small pore diameter and narrow pore-diameter distribution and that can remove microscopic foreign particles at high efficiency when used as a filtration membrane. A microporous modified-polytetrafluoroethylene membrane that is a microporous membrane produced by the steps of producing a copolymer of hexafluoropropylene or perfluoroalkyl ether and tetrafluoroethylene having the number of moles not less than 50 times that of the hexafluoropropylene or perfluoroalkyl ether, forming the copolymer into the shape of a membrane, heating the membrane to the melting point of the copolymer or above to bake the copolymer, cooling the obtained baked product, and stretching the baked product and that has a mean flow pore diameter of 30 nm or less; a porous-modified-polytetrafluoroethylene-membrane composite that incorporates the microporous membrane and a production process of the composite; and a separation membrane element incorporating the porous-modified-polytetrafluoroethylene-membrane composite..
03/20/14
20140081414
 Electrospun material covered medical appliances and methods of manufacture patent thumbnailElectrospun material covered medical appliances and methods of manufacture
A medical appliance or prosthesis may comprise one or more layers of electrospun nanofibers, including electrospun polymers. The electrospun material may comprise layers including layers of polytetrafluoroethylene (ptfe).
03/20/14
20140080031
 Dual layered eptfe polyelectrolyte membranes patent thumbnailDual layered eptfe polyelectrolyte membranes
A supported membrane for fuel cell applications includes a first expanded polytetrafluoroethylene support and a second expanded polytetrafluoroethylene support. Both the first and second expanded polytetrafluoroethylene supports independently have pores with a diameter from about 0.1 to about 1 microns and a thickness from about 4 to 12 microns.
03/20/14
20140079758
 Electrospun material covered medical appliances and methods of manufacture patent thumbnailElectrospun material covered medical appliances and methods of manufacture
A medical appliance or prosthesis may comprise one or more layers of electrospun nanofibers, including electrospun polymers. The electrospun material may comprise layers including layers of polytetrafluoroethylene (ptfe).
03/20/14
20140077419
 Fluororesin composite material, cooking utensil, cooker, roller for oa apparatus, belt for oa apparatus, and processes for producing these patent thumbnailFluororesin composite material, cooking utensil, cooker, roller for oa apparatus, belt for oa apparatus, and processes for producing these
A fluorocarbon resin composite includes a fluorocarbon resin layer on a base, in which a fluorocarbon resin constituting the fluorocarbon resin layer is crosslinked by electron beam irradiation, and the base has a desired shape obtained by machining. The fluorocarbon resin is composed of a tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer, polytetrafluoroethylene, or a mixture of the tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer and polytetrafluoroethylene.
03/13/14
20140074225
 Rotational spun material covered medical appliances and methods of manufacture patent thumbnailRotational spun material covered medical appliances and methods of manufacture
A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (ptfe).
03/13/14
20140072793
Moisture permeable waterproof composite film and moisture permeable waterproof fabric having moisture permeable waterproof composite film
The objects of the present invention are to provide a moisture permeable waterproof composite film and to provide a moisture permeable waterproof fabric which is constructed to contain the moisture permeable waterproof composite film, each of which being capable of, while retaining the moisture permeability thereof, suppressing deterioration of waterproofness even if external force is applied to these film and fabric. This moisture permeable waterproof composite film is formed of a laminate comprising of at least one layer of porous polytetrafluoroethylene, and at least one layer of porous polyurethane..
03/13/14
20140072694
Rotational spun material covered medical appliances and methods of manufacture
A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (ptfe).
03/13/14
20140072518
Polytetrafluoroethylene co-polymer emulsions
The present disclosure is directed to a class of fluorinated copolymers, such as a ptfe copolymers, that can be dissolved in low toxicity solvents, such as class iii solvents, and that enable the creation of stable water-in-solvent emulsions comprising the fluorinated copolymers dissolved in a low toxicity solvents and a hydrophilic agent (e.g., a therapeutic agent) dissolved in an aqueous solvent, such as water or saline.. .
03/13/14
20140072514
Polytetrafluoroethylene co-polymer emulsions
The present disclosure is directed to a class of fluorinated copolymers, such as ptfe copolymers, that can be dissolved in low toxicity solvents, such as class iii solvents, and that enable the creation of stable water-in-solvent emulsions comprising the fluorinated copolymers dissolved in a low toxicity solvents and a hydrophilic agent (e.g., a therapeutic agent) dissolved in an aqueous solvent, such as water or saline.. .
03/06/14
20140067047
Electrospun ptfe coated stent and method of use
A stent or other prosthesis may be formed by coating a single continuous wire scaffold with a polymer coating. The polymer coating may consist of layers of electrospun polytetrafluoroethylene (ptfe).
02/20/14
20140052264
Porous, stabilized craniomaxillofacial implants and methods and kits relating thereto
Porous craniomaxillofacial implants may include a plurality of polymeric particles sintered together at a plurality of contact points to form a porous network having pores; and an antioxidant disposed on a surface of at least some of the polymeric particles and/or in the pore of the porous network, so as to stabilize the implants from at least some oxidative damage during storage, transportation, and/or implementation (in vivo and/or ex vivo). Preferably, the polymeric particles include at least one of polyethylene, a polyethylene-polypropylene copolymer, a polyethylene-polybutylene copolymer, polytetrafluoroethylene, and expanded polytetrafluoroethylene..
02/20/14
20140048351
Acoustic cover assembly
An acoustic protective cover assembly comprising a porous membrane and an acoustic gasket is disclosed. The porous membrane is bonded to the acoustic gasket at a peripheral region, the membrane is left unhanded at a central region.
02/13/14
20140042835
Equipment including epitaxial co-crystallized material
An electric submersible pump motor can include a housing; and a hermetically sealed cavity defined at least in part by the housing that includes at least one material susceptible to hydrolysis, and a polymeric material that includes epitaxial co-crystals of perfluoroalkoxy (pfa) and polytetrafluoroethylene (ptfe). Various other apparatuses, systems, methods, etc., are also disclosed..
02/13/14
20140042096
Separation membrane module for processing of oil-containing waste water and method for processing oil-containing waste water
Provided is a separation membrane module which is suitable for filtration of oil-containing wastewater. The separation membrane module for oil-containing wastewater treatment separates water-insoluble oil from oil-containing wastewater that has high turbidity and/or high temperature.
02/13/14
20140042077
Fluoropolymer hollow fiber membrane with fluoro-copolymer and fluoro -terpolymer bonded end portion(s)
A hollow fiber membrane fluid transport device is disclosed wherein the fibers are comprised of polytetrafluoroethylene (ptfe), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting of the device utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the ptfe hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives.
02/13/14
20140042076
Fluoropolymer hollow fiber membrane with fluoro-copolymer and fluoro -terpolymer bonded end portion(s)
A hollow fiber membrane fluid transport device is disclosed wherein the fibers are comprised of polytetrafluoroethylene (ptfe), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting of the device utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the ptfe hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives.
02/13/14
20140041911
Flat dam and method for manufacturing chip package using the same
Disclosed herein is a flat dam formed in a package region of an insulation layer provided on a board to limit movement of an underfill and made of the hydrophobic material including any one of or at least two of perfluorooctyl acrylate (pfac), polypropylene, polytetrafluoroethylene (ptfe), and fluorine compound.. .
02/13/14
20140041789
Fluoropolymer hollow fiber membrane with fluoro-copolymer and fluoro -terpolymer bonded end portion(s) and method to fabricate
A hollow fiber membrane fluid transport device's method of manufacture is disclosed wherein the fibers are comprised of polytetrafluoroethylene (ptfe), and the potting materials are comprised of fluoropolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the ptfe hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives.
02/13/14
20140041788
Fluoropolymer hollow fiber membrane with fluoro-copolymer and fluoro -terpolymer bonded end portion(s)
A hollow fiber membrane fluid transport device's method of manufacture is disclosed wherein the fibers are comprised of polytetrafluoroethylene (ptfe), and the potting materials are comprised of fluoropolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the ptfe hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives.
02/13/14
20140041506
Coated musical instrument string
Disclosed is a method for making a coated musical instrument string comprising plating a musical instrument string in a composite electroless plating bath at a specified bath temperature for a specified bath time to create a coated musical instrument string to create wound musical instrument string. The musical instrument string may be plain wire or wound wire made of copper and or steel alloys.
02/06/14
20140034315
Radial conduit cutting system and method
What is presented is a metal magnalium thermite pellet that is used to create heated gas. The metal magnalium thermite pellet is made to be inserted into the cutting apparatus that is used for cutting a conduit for oil, gas, mining, and underwater pressure sealed tool applications.
01/23/14
20140024563
Anti-wear coatings for compressor wear surfaces
Anti-wear surface coatings and methods for making them are provided. Such anti-wear surface coatings are particularly suitable for use in a compressor, such as a scroll or rotary compressor.
01/23/14
20140023895
Gas-permeable filter provided with oil repellency
A gas-permeable filter provided with oil repellency is provided. The gas-permeable filter includes a porous membrane having a surface coated with an oil-repellent agent.
01/23/14
20140023540
Anti-wear coatings for scroll compressor wear surfaces
Anti-wear surface coatings and methods for making them are provided. Such anti-wear surface coatings are particularly suitable for use in a compressor, such as a scroll compressor.
01/02/14
20140001664
Matrix band for dental applications
A matrix band for dental applications including a base material and a coating. The base material has an outer surface and a tooth contact surface as well as a perimeter.
01/02/14
20140000229
Composite microporous filter material
The composite microporour filter material comprises a base-cloth layer, an upper adhesion layer attached to a top side of the base-cloth layer, and a lower adhesion layer attached to a bottom side of the base-cloth layer. The base-cloth layer is made of either polymide yarn base-cloth, polysulfoneamide yarn base-cloth, or polytetrafluoroethylene filament base-cloth.
12/26/13
20130340761
Respiratory mask having gas washout vent and gas washout vent assembly for a respiratory mask
The present invention provides a vent assembly suitable for use with a respiratory mask of the type used in cpap treatment. In one embodiment the vent is made of a thin air permeable membrane.
12/19/13
20130337271
Sliding material composition and sliding member
It is an object of the invention to provide a sliding material composition and a sliding member capable of achieving low friction property at starting time and during sliding and also being excellent in abrasion resistance, especially when a counterpart sliding member is a rubber-based material. The invention relates to a sliding material composition for use in a sliding member whose counterpart sliding member is configured of rubber, the sliding material composition comprising a binder resin, 5 to 25 vol % of an nω-monoacyl basic amino acid, 5 to 25 vol % of molybdenum disulfide, and 5 to 20 vol % of polytetrafluoroethylene..
12/12/13
20130330524
Protective covers and related fabrics
A protective cover includes a textile layer and an air permeable, moisture-vapor-transmissive, expanded polytetrafluoroethylene membrane layer attached to said textile layer, the cover having an mvtr rating of at least 4000 g/m2/day.. .
12/05/13
20130323447
Fiber reinforced shaped articles and process for making same
Blow molded articles are made from a polymeric composition containing a mixture of polyphenylene sulfide resins. For instance, the polymeric composition may contain a linear polyphenylene sulfide resin combined with a branched polyphenylene sulfide resin.
11/28/13
20130316173
Coated steel sucker rods and process for manufacture of same
In a process for applying a friction-resistant coating to a steel sucker rod, the rod is passed, in sequence, through a surface preparation stage (for example, scale removal, shot peening, or other suitable method), an adhesive application stage (to enhance the strength of the coating's bond to the rod), an extrusion stage (in which the rod is passed through a die in conjunction with a flow of melted polymeric coating material), and a cooling (coating solidification) stage. Typically, the radial thickness of the coating will be between 0.125 and 0.375 inches.
11/28/13
20130312936
Heat dissipating member and method for producing the same
The present invention provides a heat dissipating member having excellent heat dissipation properties and suitable for use in an oil environment. The present invention is a heat dissipating member including: a porous base material containing a fluorine resin and a thermally-conductive filler; and an oil contained in pores of the porous base material.
11/21/13
20130309412
Uv curable self-bonding silicone rubber
A method for manufacturing a composite article of polytetrafluoroethylene and silicone includes: (a) providing a uv-curable silicone: (b) applying the uv-curable silicone to a polytetrafluoroethylene backing; and (c) exposing the uv-curable silicone to uv radiation sufficient to cure the silicone.. .
11/21/13
20130306358
Circuit board and method of manufacturing same
Provided is a method of manufacturing a circuit board including preparing a board structural body (11) and covering a conductor circuit element (13) on an outermost layer of the board structural body (11) with a cover film (14), wherein a heat treatment is performed while having a release material (15) interposed between the cover film (14) and a heat-processing device. The release material (15) is a laminate at least including, sequentially from the cover film toward the heat-processing device, a low friction film (16) selected from an ultrahigh-molecular-weight polyethylene film and a polytetrafluoroethylene film, a first aluminum foil (17), a first high-density polyethylene film (18a), a second high-density polyethylene film (18b), and a second aluminum foil (19).
11/14/13
20130304229
Bone regeneration using biodegradable polymeric nanocomposite materials and applications of the same
A structure of, and a method of producing, a biocompatible structure for bone and tissue regeneration are disclosed. The method includes dissolving a polyurethane polymer in methanol, adding hydroxyapatite (hap) nanoparticles to form a uniformly distributed mixture, applying the mixture to a polytetrafluoroethylene (ptfe) surface to form a polymer film, cutting the polymer film into strips, stacking the strips with layers of bone particles disposed therebetween, coating the stacked strips and layers by the mixture and allowing it to dry, adding bone particles to the coating, and plasma treating the structure to form the biocompatible structure.
11/14/13
20130303672
Polycarbonate resin composition, molded article and structure member for solar photovoltaic power generation
Provided are: a polycarbonate-based resin composition, including: (a) 100 parts by mass of a resin mixture formed of: 30 to 100 mass % of a pc-pos copolymer (a-1) which has constituent units represented by a general formula (i) and a general formula (ii), and in which an average repetition number n of organosiloxane constituent units in the general formula (ii) is 70 to 500; and 70 to 0 mass % of an aromatic polycarbonate resin (a-2) except the pc-pos copolymer (a-1); (b) 0.01 to 0.15 part by mass of an alkaline (earth) metal salt of an organic sulfonic acid; (c) 0.1 to 1 part by mass of a polytetrafluoroethylene having a fibril-forming ability; and (d) 2 to 15 parts by mass of titanium dioxide particles each having, on an outermost surface thereof, a coating layer formed of a polyol free of a nitrogen atom; a molded article obtained by molding the resin composition; and a structure member for solar photovoltaic power generation formed of the molded article. The polycarbonate-based resin composition, molded article, and structure member for solar photovoltaic power generation each have excellent flame retardancy and excellent tracking resistance without impairing a low-temperature impact characteristic which a pc-pos copolymer has..
11/07/13
20130294002
Protective covers
An enhanced protective cover includes a top and bottom textile layer and an air permeable, moisture-vapor-transmissive, expanded polytetrafluoroethylene membrane layer located between the two textile layers. The cover exhibits an mvtr rating of at least 4000 g/m2/day.
10/31/13
20130288007
Methods and apparatus for casting sol-gel wafers
A mold for casting sol-gel wafers is provided. The mold may be formed of multiple low-friction layers, for example, layers made of polytetrafluoroethylene (e.g., teflon™).
10/24/13
20130281579
Dispersion spun fluoropolymer fiber prepared from non-melt-processible polytetrafluoroethylene and perfluoroalkoxy
A dispersion spun fluoropolymer fiber prepared from non-melt-processible polytetrafluoroethylene particles and perfluoroalkoxy particles.. .
10/24/13
20130281558
Polytetrafluoroethylene mixture
Provided is a material that can be easily biaxially oriented, homogeneously stretched even with a high draw ratio, and formed into a polytetrafluoroethylene porous membrane with low pressure loss. The present invention relates to a polytetrafluoroethylene mixture comprising: a modified polytetrafluoroethylene; and a fibrillable polytetrafluoroethylene homopolymer, the modified polytetrafluoroethylene having an extrusion pressure to a cylinder, at a reduction ratio of 1600, of 70 mpa or higher..
10/17/13
20130273343
Protective undergarment
An insert for a protective garment, the insert having a fabric having at least 45 percent by weight of expanded polytetrafluoroethylene fibers, the fabric having a 2-grain v-50 fragmentation resistance of at least 700 feet per second and a fast-2 bending rigidity of less than 40 micronewtonmeters.. .
10/17/13
20130272776
Ball joint
Provided is a ball joint having excellent wear resistance, corrosion resistance, and stability of sliding characteristics. A ball joint (1) according to the present invention includes: a ball stud (10) with a spherical surface section (11); and a resin seat (20) which holds and allows free rotation of the spherical surface section (11), wherein an amorphous hard carbon film with a hardness of 6 to 39 gpa is formed on the surface of the spherical surface section (11).
10/17/13
20130269834
Loader with improved funnel
A horn for an automated loader is described. The horn has an interior surface, at least a portion of which comprises a reduced-friction surface.
10/10/13
20130267621
Polytetrafluoroethylene mixture
Provided is a material that can be easily biaxially oriented, homogeneously stretched even with a high draw ratio, and formed into a ptfe porous membrane with low pressure loss. The present invention relates to a polytetrafluoroethylene mixture comprising: a fibrillable modified polytetrafluoroethylene; and a fibrillable polytetrafluoroethylene homopolymer, the polytetrafluoroethylene homopolymer having strength at break of 25 n or higher..
10/10/13
20130264090
Ptfe material having an anti-corona effect
The present invention provides a material based on high density polytetrafluoroethylene (ptfe) and its applications, such as in the production of electric cable. The ptfe material of the invention includes ptfe, a metal oxide, a lubricant and a wetting agent..
10/10/13
20130263847
Method for producing trench-like depressions in the surface of a wafer
In a method of producing trench-like depressions (24) in the surface of a wafer (27), particularly a silicon wafer, by plasma etching, in which the depressions (24) are produced by alternate passivation and etching, each depression (24) in its final geometry is provided with a protective layer (30) of the polytetrafluoroethylene type.. .
10/03/13
20130261734
Advanced kink resistant stent graft
Stent-grafts for treating thoracic aortic aneurysms and abdominal aortic aneurysms include graft portions having inflatable channels and graft extensions. The graft extensions include an undulating wire stent and porous, but substantially fluid impermeable, polytetrafluoroethylene (ptfe) graft materials..
10/03/13
20130256389
Reflow oven and methods of treating surfaces of the relfow oven
A reflow oven used to join electronic components to a substrate includes a chamber housing having surfaces that are in contact with heated air mixed with contaminants, including flux, and an intermediate layer selectively applied to the surfaces of the chamber housing. The reflow oven may include fabricating the intermediate layer with a foam material, including foaming polymers, e.g., epoxy, polyurethane, polyester, and silicone, or a non-foam material, including non-foaming polymers, e.g., polytetrafluoroethylene and polyimide.
09/19/13
20130243938
Matrix band for dental applications
A matrix band for dental applications including a base material and a coating. The base material has an outer surface and a tooth contact surface as well as a perimeter.
09/05/13
20130231020
Novel aqueous dispersion of polytetrafluoroethylene
Disclosed are aqueous dispersions of fluoropolymer comprising from 45 to 70 weight % of non-melt-processible polytetrafluoroethylene (ptfe) particles, and based on the weight of the ptfe particles, from 1 to 15 weight % of nonionic surfactants, and 1-10 weight % of a water soluble alkaline earth metal salt, or 0.1-10 weight % of a colloidal silica. Also disclosed are compositions comprising the aqueous ptfe dispersions of this invention and their uses for coating applications with improved critical cracking thickness..
09/05/13
20130230677
Polyphenylsulfone-polytetrafluoroethylene blend for anti-wear tapes in flexible oil pipes
The invention relates to an improved blend of polyphenylsulfone (ppsu) and polytetrafluoroethylene (ptfe) for producing friction-reducing tapes (anti-wear tapes) used as a friction-reducing intermediate layer in flexible fluid pipes, e.g. Oil pipes..
08/29/13
20130224472
Aqueous delivery system for low surface energy structures
An aqueous delivery system is described including at least one surfactant and at least one water insoluble wetting agent. Further described are low surface energy substrates, such as microporous polytetrafluoroethylene, coated with such an aqueous solution so as to impart a change in at least one surface characteristic compared to the surface characteristics of the uncoated low surface energy substrate..
08/29/13
20130221265
Aqueous delivery system for low surface energy structures
An aqueous delivery system is described including at least one surfactant and at least one water insoluble wetting agent. Further described are low surface energy substrates, such as microporous polytetrafluoroethylene, coated with such an aqueous solution so as to impart a change in at least one surface characteristic compared to the surface characteristics of the uncoated low surface energy substrate..
08/22/13
20130217602
Lubricating compositions for use with downhole fluids
Adding a lubricant having a metal stearate and polytetrafluoroethylene (ptfe) to a downhole fluid may lubricate a first surface once the downhole fluid has been circulated within a subterranean reservoir wellbore. Friction, torque, and/or drag may be reduced when the lubricated first surface contacts a second surface.
08/22/13
20130216720
Coatings having enhanced corrosion performance and method of using the same
A method of plating a part comprised of aluminum, alloys of aluminum, magnesium or alloys of magnesium to improve the corrosion resistance of the part. The method comprises the steps of plating the part with a plating bath comprising: (i) particles selected from the group consisting of polytetrafluoroethylene (ptfe), colloidal silica, colloidal graphite, ceramics, carbon nanotubes, silicon carbide, nano-diamond, diamond and combinations of one or more of the foregoing, which have been treated with a corrosion inhibitor and are dispersed in said plating bath; and (ii) metal ions to be plated.
08/15/13
20130210302
Aqueous delivery system for low surface energy structures
An aqueous delivery system is described including at least one surfactant and at least one water insoluble wetting agent. Further described are low surface energy substrates, such as microporous polytetrafluoroethylene, coated with such an aqueous solution so as to impart a change in at least one surface characteristic compared to the surface characteristics of the uncoated low surface energy substrate..
08/08/13
20130204355
Medical device made of eptfe partially coated with an antimicrobial material
A medical device includes a porous article of expanded polytetrafluoroethylene (eptfe) having a microstructure of nodes interconnected by fibrils, and a coating including an antimicrobial material at the surface of the porous article, wherein the microstructure at a surface of the porous article is only partially coated with the antimicrobial material.. .
08/08/13
20130204347
Lattice
The invention relates to medical devices and methods of using them. The devices are prostheses which can be percutaneously deliverable with (or on) an endovascular catheter or via other surgical or other techniques and then expanded.
08/01/13
20130192748
Stretch composite fabric and exapnded porous polytetrafluoroethylene film
A stretch composite fabric comprises a sintered expanded porous polytetrafluoroethylene film and a stretch cloth laminated to each other while maintaining a flat state. The stretch composite fabric has a tensile stress at 10% elongation, as measured in at least one direction, of 1.8 n/15 mm or less.
07/18/13
20130184810
Rotational spun material covered medical appliances and methods of manufacture
A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (ptfe).
07/18/13
20130184808
Rotational spun material covered medical appliances and methods of manufacture
A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (ptfe).
07/18/13
20130184807
Articles including expanded polytetrafluoroethylene membranes with serpentine fibrils and having a discontinuous fluoropolymer layer thereon
Articles comprising an expanded polytetrafluoroethylene membrane having serpentine fibrils and having a discontinuous coating of a fluoropolymer thereon are provided. The fluoropolymer may be located at least partially in the pores of the expanded fluoropolymer membrane.
07/18/13
20130184401
Method for manufacturing fine polytetrafluoroethylene powder
A method for manufacturing a polytetrafluoroethylene fine powder characterized by including the steps of (1) preparing an aqueous dispersion containing polytetrafluoroethylene, water, and a surfactant (a); (2) coagulating the polytetrafluoroethylene in the aqueous dispersion by agitating the aqueous dispersion with a discharge flow-type impeller; (3) collecting a wet powder of the polytetrafluoroethylene; and (4) drying the wet powder of the polytetrafluoroethylene.. .
07/18/13
20130184395
Dripping inhibitor and resin compound
Provided is a dripping inhibitor excellent in handling characteristics. The present invention provides a dripping inhibitor including a modified polytetrafluoroethylene, the inhibitor having an average particle size of 300 to 800 μm, an apparent density of 0.40 to 0.52 g/ml, a compression ratio of 1.20 or less, an aggregate disintegration degree with 50-sec vibration of 70% or more, a cylinder extrusion pressure at a reduction ratio 1500 of 80 mpa or less, and a standard specific gravity (ssg) of 2.140 to 2.230..
07/18/13
20130183515
Articles including expanded polytetrafluoroethylene membranes with serpentine fibrils
Articles including expanded fluoropolymer membranes having serpentine fibrils are provided. The fluoropolymer membranes exhibit high elongation while substantially retaining the strength properties of the fluoropolymer membrane.
07/11/13
20130178474
Water treatment composition containing halogen-releasing compound and fluoropolymer
The present invention is directed to a water treatment composition, containing 50-99.9 wt. % of particulate halogen-releasing compound; and 0.1-10 wt.


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Polytetrafluoroethylene topics: Polytetrafluoroethylene, Tetrafluoroethylene, Tetrafluoro, Homogeneous, Fluoropolymer, Gel Formulation, Surfactant, Carbon Film, Fragmentation, Silicon Wafer, High Density, Aqueous Solution, Polyurethane, Colloidal Silica, Thoracic Aortic Aneurysm

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This listing is a sample listing of patents related to Polytetrafluoroethylene for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Polytetrafluoroethylene with additional patents listed. Browse our RSS directory or Search for other possible listings.
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