Patents Examined by Fred Zitomer
  • Patent number: 6696534
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold, are disclosed.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: February 24, 2004
    Assignee: Clemson University
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger
  • Patent number: 6689855
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold) are disclosed.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: February 10, 2004
    Assignee: Clemson University
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger
  • Patent number: 6686426
    Abstract: In preparing a fluorinated thermoplastic with good flex life, high thermal conductivity and low average spherolite diameter from tetrafluoroethylene and perfluoro n-alkyl vinyl ether, perfluoro 2-propoxyalkyl vinyl ether is additionally incorporated into the fluorinated thermoplastic. A semicrystalline, thermoplastically processable copolymer is prepared, made from units of the tetrafluoroethylene, from 2 to 10% by weight of units of perfluoro n-propyl vinyl ether and from 0.1 to 6% by weight of units of perfluoro 2-propoxypropyl vinyl ether. The novel copolymer preferably contains fewer than 70 unstable end groups per 106 carbon atoms, has thermal conductivity of at least 0.19 W/mK at 23° C. and has a smooth surface with an average spherolite diameter of <5 &mgr;m. The novel terpolymer is suitable for extrusion of hose, in particular for heat exchangers, and also for ultrahigh-purity applications.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: February 3, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Ralph Kaulbach, Helmut Traunspurger
  • Patent number: 6680346
    Abstract: A phosphorus atom-containing fluorinated cation exchange membrane substantially constituted with the following repeating units (A) and (B), and a proton conduction type fuel cell using the membrane as a solid polymeric electrolyte are provided. One embodiment for the membrane is useful as a perfluoro cationic exchange membrane for use in electrolysis of sodium chloride even under severe electrolytic conditions of higher concentration, higher temperature and higher electric density. (in which m is 0 or 1, n is 2 or 3, X, Y represents H or C6H4SO3H and the ratio for the number of repeating units is (A)/(B)=1.5 to 15).
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: January 20, 2004
    Assignees: Mirane Corporation, Premelec Electrode Ltd.
    Inventor: Kyoji Kimoto
  • Patent number: 6677033
    Abstract: The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to wear, tear and creep, decay, and degradation by wetting, staining and warping, and to improve durability while maintaining the appearance of the substrate.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: January 13, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joy Sawyer Bloom, Kiu-Seung Lee, Robert Clayton Wheland
  • Patent number: 6667349
    Abstract: The present invention relates to a process for preparing gel-like anion exchangers by aminating crosslinked gel-like styrene divinybenzene bead polymers that contain halogenoalkyl groups in the presence of an inorganic salt and in the absence of organic solvents.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: December 23, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Holger Lütjens, Reinhold Klipper, Georg Martin, Alfred Mitschker, Michael Holzbrecher
  • Patent number: 6667369
    Abstract: (Meth)acrylic polymers having alkenyl or curable silyl groups at the chain ends in high functionality ratios are prepared by a process which comprises (i) preparing a (meth)acrylic polymer having halogen atoms at the chain ends, using an organohalogenated compound or a halosulfonyl compound as an initiator and a metal complex catalyst wherein the central metal atom is selected from the group consisting of the elements of Groups 8, 9, 10 and 11 of the periodic table; and (ii) transforming the halogen atom into an alkenyl group- or a curable silyl group-containing substituent. The obtained (meth)acrylic polymers form homogeneous curing materials.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: December 23, 2003
    Assignee: Kaneka Corporation
    Inventors: Masato Kusakabe, Kenichi Kitano
  • Patent number: 6660818
    Abstract: A method for producing a fluoropolymer, which comprises polymerizing a monomer containing a fluoromonomer having a polymerizable double bond, using an initiator, in a medium containing fluoroform and water, under a condition such that fluoroform is in a supercritical state.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: December 9, 2003
    Assignees: Asahi Glass Company, Limited
    Inventors: Yoshio Okahata, Toshiaki Mori, Yuri Tsuchiya
  • Patent number: 6649663
    Abstract: The present invention relates to a process for preparing novel, monodisperse ion exchangers having chelating functional groups, and their use for adsorbing metal compounds, in particular, heavy metal compounds and noble metal compounds, and also for extracting alkaline-earth metals from saline solutions from alkali metal chloride electrolysis.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: November 18, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhold Klipper, Werner Strüver, Ulrich Schnegg, Bruno Hees, Bernhard Lehmann, Holger Lütjens
  • Patent number: 6649715
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold, are disclosed.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: November 18, 2003
    Assignee: Clemson University
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger
  • Patent number: 6646077
    Abstract: Peroxide curable fluoroelastomers having copolymerized units of vinylidene fluoride or tetrafluoroethylene major monomer, at least one other fluorinated major monomer, a cure site monomer having the general formula CH2═CH—(CF2)nI, where n is an integer between 2 and 8, and iodine bound at the terminal positions of polymer chains, process well and have excellent tensile properties.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: November 11, 2003
    Assignee: DuPont Dow Elastomers LLC
    Inventor: Donald Frederick Lyons
  • Patent number: 6646075
    Abstract: This invention relates to high molecular weight perfluorocyclobutane polymers and methods of polymerizing trifluorovinyl monomers to form high molecular weight perfluorocyclobutane polymers in the presence of a catalyst or initiator.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: November 11, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Shane S. Mao, Allen Raymond Siedle
  • Patent number: 6632847
    Abstract: Polymer composition, membrane comprising the same, process for production thereof and use thereof The composition described comprises 30 to 99.5% by weight of a sulfonated aromatic polyether ketone which has an ion-exchange capacity of from 1.3 to 4.0 meq (—SO3H)/g of polymer, and from 0.5 to 70% by weight of a polybenzimidazole. This composition can, as can a sulfonated polyether ketone of PEK type, be processed to give membranes, preferably used in fuel cells.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: October 14, 2003
    Assignee: Celanese Ventures GmbH
    Inventors: Thomas Soczka-Guth, Georg Frank, Jochen Baurmeister, Jürgen Pawlik, Rüdiger Knauf
  • Patent number: 6632848
    Abstract: A heterogeneous anion exchanger comprising from 35 to 85 mass % of an anion exchange resin and from 15 to 65 mass % of a binder polymer, wherein the anion exchange resin is made of a polymer having repeating units represented by the following formula (1): wherein R is a C3-8 alkylene group or an alkyleneoxyalkyl group having a total carbon number of from 4 to 9, R1 is a C1-4 alkyl group which may be substituted by a hydroxyl group, each of R2 and R3 is a C1-4 alkyl group, and X− is an anion, and wherein any hydrogen atom bonded to the benzene ring may be substituted by an alkyl group or a halogen atom.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: October 14, 2003
    Assignee: Asahi Glass Company, Limited
    Inventor: Yoshio Sugaya
  • Patent number: 6632902
    Abstract: A process for rotomolding using novel melt-extruded melt-fabricable TFE copolymer minicubes, wherein at least 80% of the minicubes are in the size range of 200 to 1200 &mgr;m.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: October 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Jacob Lahijani
  • Patent number: 6627709
    Abstract: Polymer particles are obtained by dispersion polymerization of styrene and acrylic acid ester along with an organosilane compound. The polymer particles have simultaneously an excellent particle size distribution, a large particle size and a satisfactory molecular weight. A toner in which the polymer particles are used as binder resin is especially suitable for high image quality and high-density printing.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: September 30, 2003
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Akira Endo
  • Patent number: 6624241
    Abstract: The invention provides an aqueous coating composition containing a dispersed, emulsified, or dissolved material (organic compound, resin, or polymer), in which the material is dispersed, emulsified, or dissolved with a water-soluble, carbamate-functional material. The invention further provides a coating prepared from the coating composition and a coated substrate, especially an automotive substrate, having the coating thereon.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: September 23, 2003
    Assignee: BASF Corporation
    Inventors: Robert D. Weise, Walter H. Ohrbom, Patricia A. Herrel, David J. Law
  • Patent number: 6623680
    Abstract: A tetrafluoroethylene/hexafluoropropylene copolymer with high drawability is provided. Also provided is a process employing the polymer and an article coated with the polymer.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: September 23, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Ralph Kaulbach, Albert Killich, Friedrich Kloos, Gernot Loehr, Ludwig Mayer, Erik Peters, Thomas J. Blong, Denis Duchesne
  • Patent number: 6624269
    Abstract: Tetrafluoroethylene (TFE) thermoprocessable copolymer microspheres having a substantially spherical shape for at least 95% by weight, the average size of the microspheres being in the range 25 &mgr;m and 2 mm, the bulk density being in the range 0.5 and 1.1 g/cm3.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: September 23, 2003
    Assignee: Solvay Solexis S.p.A.
    Inventors: Hua Wu, Francesco Morandi
  • Patent number: RE38913
    Abstract: A BIOCOMPATIBLE HYDROGEL, is provided for use in the treatment of humans for cosmetic and functional defects (e.g. in mammas, vocal cords, penis, etc. as endoprostheses), in the provision of intratissue storage sites the prolonged-action medicinal preparations, in various applications as electroconductive immersion media, and in the life-long tamponing of caverns. It contains an acrylamide-based polymer produced in the presence of an initiator of radical polymerization in apyrogenic water as the dispersion medium. An increase in elasticity, shape retention capability, and stability of bulky implants, as well as corresponding therapeutic and cosmetic efficacy, mainly in the endoprosthetic applications is achieved due to the hydrogel containing cross-linked polyacrylamide produced by using a biocompatible cross-linking agent, such as methylene-bis-acrylamide, and preferably a mixture of ammonium persulfate and tetramethylethylenediamine as the initiator of polymerzation.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: December 6, 2005
    Assignee: Contura SA
    Inventor: Boris Ivanovich Pavlyk