Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8163857 | Polyfluoroalkadiene mixture and method for producing the same A mixture of polyfluoroalkadienes represented by the general formulae: CF3(CF2)nCF═CH(CF2)m+1CH═CH2 [Ia] and CF3(CF2)n+1CH═CF(CF2)mCH═CH | 04/24/2012 |
| 8013089 | Fluoropolymer composition for lining adhesion to a surface A composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder is disclosed that enables the composition to be used for adhering a lining to an interior surface of a hollow article. ... | 09/06/2011 |
| 7842765 | Crosslinkable vinyl fluoride copolymers The present invention provides a vinyl fluoride copolymer comprising: about 40 to about 90 mole % of repeat units derived from vinyl fluoride; and about 10 to about 60 mole % of repeat units derived from monomer se... | 11/30/2010 |
| 7803889 | Granulated powder of low-molecular polytetrafluoro-ethylene and powder of low-molecular polytetrafluoro-ethylene and processes for producing both This invention provides a granulated powder of low-molecular-weight polytetrafluoroethylene reduced in the possibility of the powder being blown up or adhering to hoppers, a low-molecular-weight polytetrafluoroethylene powder obtainable by suspension polymerization,... | 09/28/2010 |
| 7759441 | Radically coupled PTFE polymer compounds and method for the production thereof Radically coupled PTFE polymer compounds useful, for example, as tribo materials, and a method for the production thereof. Radically coupled PTFE polymer compounds are provided which exhibit improved wear resistances with comparable gliding properties, and furthermo... | 07/20/2010 |
| RE40902 | Tetrafluoroethylene/hexafluoropropylene copolymers with higher drawability A tetrafluoroethylene/hexafluoropropylene copolymer with high drawability is provided. Also provided is a process employing the polymer and an article coated with the polymer. ... | 09/01/2009 |
| 7531611 | Copolymers of tetrafluoroethylene A polymerization process for producing a tetrafluoroethylene copolymer, and the copolymer produced thereby, are provided. The copolymer is of the dispersion/fine powder type and contains polymerized tetrafluoroethylene monomer units and co-polymerized higher homolog... | 05/12/2009 |
| 7521514 | Emulsion polymerization of dipolymers of tetrafluoroethylene and 3,3,3-trifluoropropene An aqueous semi-batch polymerization process is disclosed for the manufacture of dipolymers of tetrafluoroethylene and 3,3,3-trifluoropropene that contain between 45 and 95 mole percent tetrafluoroethylene and between 5 and 55 mole percent 3,3,3-trifluoropropene. | 04/21/2009 |
| 7498392 | Methods and compositions for dielectric materials The present invention comprises methods and compositions of dielectric materials. The dielectric materials of the present invention comprise materials having a dielectric constant of more than 1.0 and less than 1.9 and/or a dissipation factor of less than 0.0009. Ot... | 03/03/2009 |
| 7438995 | Use of partially fluorinated polymers in applications requiring transparency in the ultraviolet and vacuum ultraviolet Disclosed are partially fluorinated and fully fluorinated polymers that are substantially transparent to ultraviolet radiation at wavelengths from approximately 150 nanometer to 260 nanometers. ... | 10/21/2008 |
| 7429631 | Fluorocopolymer A fluorecopolymer which comprises repeating units (a) based on tetrafluoroethylene, repeating units (b) based on perfluoro(methyl vinyl ether) and repeating units (c) based on perfluoro(propyl vinyl ether) in a molar ratio of (a)/(b)/(c) of 40-70/3-57/3-57. The fluo... | 09/30/2008 |
| 7408011 | Photoresists, fluoropolymers and processes for 157 nm microlithography The invention provides a polymer having (a) at least one repeat unit derived from an ethylenically unsaturated compound having at least one fluorine atom covalently attached to an ethylenically unsaturated carbon atom; and (b) at least one repeat unit derived from a... | 08/05/2008 |
| 7402640 | Fluoropolymer and film made of it A fluorocopolymer and film thereof exhibiting excellent transparency and mechanical strength at ambient and elevated temperatures, wherein the fluorocopolymer includes polymerized units based on ethylene (E), tetrafluoroethylene (TFE), hexafluoropropylene (HFP) and ... | 07/22/2008 |
| 7393624 | Negative resists based on acid-catalyzed elimination of polar molecules The present invention provides polymers that are useful in negative resist compositions. Polymers of the present invention comprise (1) a first monomer having a polar functional group; (2) a second monomer; and optionally, (3) a third monomer that imparts at least o... | 07/01/2008 |
| 7381774 | Perfluoroelastomer compositions for low temperature applications Perfluoroelastomers that contain high levels (i.e. about 40 mole percent or more) of perfluoro(alkyl vinyl ether) copolymerized units can form stable blends with higher levels of perfluoropolyethers than can perfluoroelastomers that contain lower levels of perfluoro... | 06/03/2008 |
| 7378475 | Process for making vinyl fluoride interpolymers and dispersions thereof Interpolymers of 1-99 mol % vinyl fluoride and 99-1 mol % of at least one highly fluorinated monomer such as tetrafluoroethylene are disclosed. The interpolymers are characterized by the presence of ionic end groups and are prepared by polymerizing VF and fluorinate... | 05/27/2008 |
| 7375159 | Vinylidene fluoridepolymer having a fraction of non-transferred chains and its manufacturing process Blends of PVDF (polyvinylidene fluoride) homopolymer or copolymer with ABC triblock copolymers are useful for manufacturing parts which may be sheets, film, tubes, rods, centrifugal pump components and containers. The PVDF comprises a fraction of non-transferred cha... | 05/20/2008 |
| 7375171 | Process for preparing vulcanizable fluorine-containing elastomer The present invention provides a process for preparing a fluorine-containing elastomer in a high productivity comparable to that of non-iodine transfer polymerization process by carrying out an iodine transfer polymerization at high pressure. The present invention a... | 05/20/2008 |
| 7361717 | Fluorocopolymer film and its application A fluorocopolymer film formed by molding at a molding temperature of at most 320° C. a fluorocopolymer comprising repeating units based on ethylene, repeating units based on tetrafluoroethylene, repeating units based on hexafluoropropylene and repeating units based... | 04/22/2008 |
| 7361421 | Lubricant, magnetic recording medium and production method of magnetic recording medium A lubricant is obtained by mixing at least one compound selected from specific fluorine-based diester dicarboxylic acid compounds having has two carboxyl groups, two ester bonds, terminal groups each of which is an alkyl group or an alkenyl group, and one fluoroethe... | 04/22/2008 |
| 7358296 | Aqueous dispersions of fluoropolymers Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a non ionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. T... | 04/15/2008 |
| 7351352 | 1,1,1,2,2,3,3,4,4-Nonafluoro-4-methoxybutane refrigerant compositions comprising a fluoroether and uses thereof Disclosed herein are 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane refrigerant or heat transfer fluid compositions further comprising and a fluoroether compound, which are useful in refrigeration or air conditioning apparatus or as heat transfer fluids. The compositi... | 04/01/2008 |
| 7348386 | Process for producing fluorocopolymer, fluorocopolymer, and molded object The present invention relates to a method for producing a fluorocopolymer which comprises a polymerization reaction of a fluorine-containing ethylenic monomer with a fluorovinyl ether derivative represented by the following general formula (I): CF2 | 03/25/2008 |
| 7345124 | Process for preparing fluorine-containing polymer The present invention provides a process for preparing a fluorine-containing polymer having few branched chains and little weight change in high temperatures, which is a new process wherein composition distribution substantially does not occur. The fluorine-containi... | 03/18/2008 |
| 7342066 | Aqueous dispersions of polytetrafluoroethylene particles The present invention provides an aqueous non-melt processible polytetrafluoroethylene dispersion comprising non-melt processible polytetrafluoroethylene particles in an amount between 30 and 70% by weight based on the total weight of the dispersion and one or more ... | 03/11/2008 |
| 7342081 | Fluoropolymer compositions, coated articles, and method of making the same A fluoropolymer composition comprising a fluoropolymer with a particle size distribution having a ratio of the mode to D95 of 0.75 or greater and wherein when the fluoropolymer is a copolymer consisting of interpolymerized units derived from tetrafluoroethylene and ... | 03/11/2008 |
| 7332155 | Surfactant-containing cosmetic, dermatological and pharmaceutical agents The invention provides surfactant-containing cosmetic, dermatological, and pharmaceutical agents comprising at least one water-soluble or water-swellable copolymer obtainable by free-radical copolymerization of A) acryloyldimethyltaurine and/or acryloyl... | 02/19/2008 |
| 7326512 | Polymer compound, resist composition and dissolution inhibitor agent containing the polymer compound Provided are a polymer compound having high transparency for use in a photoresist composition for microfabrication of the next generation, a resist composition using the polymer compound as a base polymer, and a dissolution inhibitor agent composed of the polymer co... | 02/05/2008 |
| 7314667 | Process to optimize properties of polymer pellicles and resist for lithography applications Disclosed are pellicle compositions and methods of making such pellicle compositions. The pellicle compositions provided include highly fluorinated polymers as well as fluorinated polymer/PVDF co-polymers. ... | 01/01/2008 |
| 7312287 | Fluorinated polymers useful as photoresists, and processes for microlithography This invention provides a fluorine-containing copolymer having a repeat unit derived from at least one fluorinated olefin and a repeat unit derived from at least one polycyclic ethylenically unsaturated monomer having pendant hydroxyl or esterified hydroxyl groups, ... | 12/25/2007 |
| 7304101 | Method of purifying a dispersion of ionic fluoropolymer Anionic species are removed from aqueous dispersions of ionic fluoropolymers using anion exchange resins. In some embodiments, cationic species are also removed using cation exchange resins. ... | 12/04/2007 |
| 7300989 | Dispersions containing bicomponent fluoropolymer particles and use thereof The present invention provides a method of preparing an aqueous dispersion of poly(perfluorovinyl ether) homopolymers. The present invention further relates to a method of making an aqueous fluoropolymer dispersion comprising bicomponent particles of poly(perfluorov... | 11/27/2007 |
| 7300743 | Radiation durable organic compounds with high transparency in the vacuum ultraviolet, and method for preparing This invention concerns radiation durable organic compositions which are well-suited for use in 157 nm lithography by virtue of their high transparency and excellent radiation durability, and to a process for the preparation thereof. ... | 11/27/2007 |
| 7300739 | Negative resists based on a acid-catalyzed elimination of polar molecules The present invention provides polymers that are useful in negative resist compositions. Polymers of the present invention comprise (1) a first monomer having a polar functional group; (2) a second monomer; and optionally, (3) a third monomer that imparts at least o... | 11/27/2007 |
| 7297328 | Surfactant-free cosmetic, dermatological and pharmaceutical agents The invention provides a surfactant-free cosmetic, dermatological, and pharmaceutical agents comprising at least one copolymer obtainable by free-radical copolymerization of A) acryloyldimethyltaurine and/or acryloyldimethyltaurates, B) opt... | 11/20/2007 |
| 7294668 | Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant An aqueous non-melt processible polytetrafluoroethylene dispersion having non-melt processible polytetrafluoroethylene particles in an amount of 30 to 70% by weight and an amount of non-ionic surfactant between 2 and 15% by weight based on the weight of polytetraflu... | 11/13/2007 |
| 7279154 | Use of comb copolymers based on acryloyldimethyltaurine acid in cosmetic, pharmaceutical and dermatological products The invention relates to uses of comb polymers of acryloyldimethyltaurine and/or acryloyldimethyltaurates in cosmetic, pharmaceutical and dermatological applications as thickeners, dispersing agents, suspending agents, emulsifiers, stabilizers, solubilizers, conditi... | 10/09/2007 |
| 7276287 | Melt-processible poly(tetrafluoroethylene) Melt-processible, thermoplastic poly(tetrafluoroethylene) (PTFE) compositions are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described. ... | 10/02/2007 |
| 7273645 | Fluorocopolymer A fluorocopolymer which comprises (A) polymerized units based on tetrafluoroethylene, (B) polymerized units based on ethylene and (C) polymerized units based on itaconic anhydride or citraconic anhydride, wherein the molar ratio of (A)/(B) is from 20/80 to 80/20, an... | 09/25/2007 |
| 7270870 | Multi-layer polymer film The disclosure is directed to a polymer film including a first layer and a second layer. The first layer includes a first fluoropolymer and has a melting point less than 135° C. The second layer overlies the first layer and includes a second fluoropolymer. The seco... | 09/18/2007 |
