Patents Examined by Helen Lee
  • Patent number: 5662972
    Abstract: A process for producing a tubular laminate which comprises, discharge-treating an outer surface of a tubular fluorine-containing resin molded article in an inert gas atmosphere containing an organic compound having a functional group, extruding a molten resin onto the treated surface and coating the treated surface with the molten resin. According to this process, there can be obtained a strong adhesion between the fluorine-containing resin molded article and the coating resin without using an adhesive. Therefore, an applying step of the adhesive can be omitted and the tubular laminate can be produced continuously.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: September 2, 1997
    Assignee: Daikin Industries, Ltd.
    Inventors: Kazuhiko Shimada, Yutaka Nakata, Kenjiro Idemori
  • Patent number: 5663219
    Abstract: The peel strength of lightweight, liquid polysulfide-based sealants for aircraft is improved by the addition of an epoxy-terminated liquid polysulfide to the liquid polysulfide. The lightweight sealants have a specific gravity of from about 1 to about 1.3 and the amount of epoxide terminated polysulfide is from about 0.4 to about 5% of the weight of the polysulfide present in the sealant. Fillers having a specific gravity of from about 0.1 to about 2.2 are used.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: September 2, 1997
    Assignee: Morton International, Inc.
    Inventors: Kanu R. Chokshi, Keith B. Potts
  • Patent number: 5661191
    Abstract: Expandable rubber-modified styrene resin beads, expanded rubber-modified styrene resin beads, and expanded molded rubber-modified styrene resin articles are described. The expandable beads comprise a rubber-modified styrene resin comprising a styrene resin having dispersed therein 8 to 15% by weight of conjugated diene rubber particles having a 1,4-cis structure in a proportion of not less than 70% and an average particle size of 1.5 to 3.0 .mu.m, the rubber-modified styrene resin having a mineral oil content of not more than 3.0% by weight, and the expandable rubber-modified styrene resin beads containing 1 to 15% by weight of a volatile blowing agent. The expanded molded article has excellent appearance, impact resistance and softness.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: August 26, 1997
    Assignee: Mitsubishi Chemical BASF Company Limited
    Inventors: Kenji Haraguchi, Takanori Suzuki, Mitsuo Furuichi, Hiromi Yamanaka, Masayuki Tanaka
  • Patent number: 5658960
    Abstract: In this invention a new form of polytetrafluoroethylene has been found to be compression moldable to provide strong molded articles. It is also useful as an additive or strength binder. The new form is a compression molding powder comprised of comminuted, sheared particles of expanded porous polytetrafluoroethylene, said particles having a modular-microfibrillar structure of irregular shape, and a mean particle size between 5 and 500 micrometers, and having a coating of a thermoplastic fluoropolymer on at least a portion of the particle. By irregular shape is meant that the nodes and fibrils do not have an ordered arrangement. The bulk density is about 0.06 to 0.2 g/cc.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: August 19, 1997
    Assignee: W.L. Gore & Associates, Inc.
    Inventor: John W. Dolan
  • Patent number: 5658977
    Abstract: Cold water insoluble, hot water soluble and/or dispersible, disposable films, fabrics and other useful articles of manufacture are formed from a miscible polymeric resin blend comprised of cold water soluble partially hydrolyzed polyvinyl alcohol, cold water insoluble hot water disintegrable aliphatic polyester, and minor proportions of processing and performance aids. The aliphatic polyester has a melt temperature above the normal body temperature of a human (37 degrees C.; 98.6 degrees F.) and is present in the resin blend at a concentration sufficient to constitute the continuous phase of the blend, with the polyvinyl alcohol constituting a discontinuous phase of the blend. The aliphatic polyester thus renders the resin blend, and the partially hydrolyzed polyvinyl alcohol in the blend, cold water insoluble and determines the temperature at which articles formed from the blend will be subject to dissolution in an aqueous bath and subsequent disposal in an environmentally and ecologically sound fashion.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: August 19, 1997
    Assignee: Planet Polymer Technologies, Inc.
    Inventors: Xiaoming Yang, Robert J. Petcavich
  • Patent number: 5658651
    Abstract: A system for the softening or other treatment of fabric articles is provided which comprises a vented bag comprising a fastening system and flexible sheet releasably impregnated with an effective amount of a liquid fabric-treatment composition.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: August 19, 1997
    Assignee: Creative Products Resource, Inc.
    Inventors: James A. Smith, George W. Kellett
  • Patent number: 5656354
    Abstract: Described is a multilayered base layer comprising at least one textile layer and at least one copper layer which are joined together by needling, wherein the puncture holes produced in the copper layer by the needling have a diameter of not more than 1 mm, and a process for producing it.Also described is the use of this layer as a starting material for producing bituminized sealing felts and also the use of the multilayered base layer and of the bituminized sealing felts produced therefrom for discharging electrostatic charges.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: August 12, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Franz Kaulich
  • Patent number: 5654082
    Abstract: Disclosed is an easily tearable laminated film suitable as a sealed pouch or a lid of a sealed container, which can be easily and reliably torn along a direction of any specific shape such as a linear shape, an annular shape, or a V shape in opening the pouch or the lid. This easily tearable laminated film includes a porous organic resin film, a heat-fusible resin film, and an adhesive layer interposed between these films. The porous organic resin film consists of a rigid organic resin film whose entire surface has a large number of fine through and/or non-through pores, and has a higher tearability than that of an organic resin film having no pores. The porous organic resin film and the heat-fusible resin film are bonded with a higher strength than the tear strength of the porous organic resin film in a tear region and with a strength not higher than the tear strength of the porous organic resin film in an adjoining region adjacent to the tear region.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: August 5, 1997
    Inventor: Seiji Kagawa
  • Patent number: 5654068
    Abstract: A stain-resist for polyamide textiles comprises blends of maleic anhydride/alpha-olefin polymers with sulfonated phenol-formaldehyde condensation products. The stain-resist blends are water-soluble at low pH, even in the absence of surfactant, and are strongly substantive and more resistant to yellowing than the condensation products.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: August 5, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Engelbert Pechhold
  • Patent number: 5654383
    Abstract: The invention relates to polyarylene sulfides (PAS), preferably polyphenylene sulfide (PPS), reduced in viscosity by aftertreatment of the PAS formed in the production process with disulfides in the melt.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: August 5, 1997
    Assignee: Bayer AG
    Inventors: Burkhard Kohler, Klaus Kraft, Klaus Reinking, Bahman Sarabi, Wolfgang Ebert
  • Patent number: 5654348
    Abstract: A high-performance composite reinforcing material for optical fiber cables, exhibiting excellent protective effect when incorporated into a reinforcing component of optical fiber cables, and having a degree of flexibility applicable to curved wiring of a small radius of curvature.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: August 5, 1997
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Mika Nishida, Hiroshi Kawashima, Arata Iwasaki
  • Patent number: 5650459
    Abstract: A poly(arylene sulfide) resin composition comprising in admixture a poly(arylene sulfide) resin and at least one nickel compound selected from the group consisting of (a) nickel carbonates, (b) nickel hydroxide, (c) organic carboxylates of nickel and (d) nickel oxide is provided. According to the resin composition of the invention, the metal corrosiveness of the poly(arylene sulfide) resin upon and after its molding or forming is sufficiently inhibited without deteriorating the excellent heat resistance, mechanical properties, processability and the like inherent in the resin.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: July 22, 1997
    Assignee: Kureha Kagaku Kogyo K.K.
    Inventors: Yoshikatsu Satake, Toshihiko Ono
  • Patent number: 5648453
    Abstract: Electroconductive polymers having a chemical structure represented by, for example, the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 independently represent H, a C.sub.1 to C.sub.20 alkyl or alkoxy group, an amino group, a trihalomethyl group or a phenyl group, X represents S, O, Se, Te or NR.sub.3 R.sub.3 represents H, a C.sub.1 to C.sub.6 alkyl group or an aryl group, M represents a cation such as M.sup.+, an alkali metal ion or a quaternary ammonium ion, and m is 0.2 to 2 and a process for producing the polymer.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 15, 1997
    Assignee: Showa Denko K.K.
    Inventors: Yoshihiro Saida, Yoshiaki Ikenoue, Reiko Ichikawa
  • Patent number: 5648087
    Abstract: The present invention relates to an anaesthetic veterinary pharmaceutical composition, comprising a general anaesthetic selected from phencyclidine derivatives such as ketamine or tiletamine, as well as 0.015 to 1.25 molar equivalents of selegiline, combined in a single pharmaceutical composition or presented separately.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: July 15, 1997
    Assignee: Sanofi Sante Nutrition Animale
    Inventors: Patricia Ovaert, Eliane Boivin
  • Patent number: 5646192
    Abstract: In this invention a new form of polytetrafluoroethylene has been found to be compression moldable to provide exceptionally strong molded articles. It is also useful as an additive or strength binder. The new form is a compression molding powder comprised of comminuted, sheared particles of expanded porous polytetrafluoroethylene, said particles having a nudular-microfibrilar structure of irregular shape, and a mean particle size between 5 and 500 micrometers. By irregular shape is meant that the nodes and fibrils do not have an ordered arrangement. The bulk density is about 0.06 to 0.2 g/cc.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: July 8, 1997
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: John W. Dolan, Charles E. Singleton
  • Patent number: 5643968
    Abstract: The present invention relates to ion exchange membranes comprising soluble graft copolymer comprising a backbone of a first polymer having a main chain containing aromatic rings and a polymerizable vinyl or ring containing compound which contains at least one functional group which displays ion exchange functionality or may be converted to display ion exchange functionality, which is grafted onto said first polymer on at least one of said aromatic rings or on at least one benzylic carbon atom of said aromatic rings. The copolymer components may be selected to produce membranes for a variety of uses including electrodialytic processes such as electrodialytic concentration and separation processes, electrodialytic water splitting, electrolysis or electrolytic splitting of water and fuel cells for electrical generation; and pressure or chemical potential driven membrane processes such as ultrafiltration, reverse osmosis, piezodialysis, diffusion dialysis and pervaporation.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: July 1, 1997
    Assignee: The Graver Company
    Inventors: Christopher Andreola, Frederick P. Chlanda, Jian-Ping Huang
  • Patent number: 5643978
    Abstract: The present invention is directed to an imidized polycarboxylic acid polymer useful as a cement admixture, to improved cement compositions containing said polymer and to a process of forming the same.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 1, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David Charles Darwin, Ellis Martin Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence Lu Kuo
  • Patent number: 5641836
    Abstract: This invention discloses a rubber composition having a high modulus and excellent processability which is comprised of a blend of (1) at least one elastomer selected from the group consisting of polybutadiene rubber, styrene-butadiene rubber, synthetic polyisoprene rubber, natural rubber, isoprene-butadiene rubber, isoprene-butadiene-styrene rubber, nitrile rubber, carboxylated nitrile rubber, and EPDM rubber, (2) at least one thermotropic liquid crystalline polymer containing an aliphatic spacer, wherein the thermotropic liquid crystalline polymer exhibits no apparent crystalline to nematic transition, wherein the thermotropic liquid crystalline polymer exhibits nematic order above its glass transition temperature, and wherein the glass transition temperature of the thermotropic liquid crystalline polymer is within the range of 20.degree. C. to 180.degree. C., and (3) carbon black.
    Type: Grant
    Filed: December 11, 1995
    Date of Patent: June 24, 1997
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: John Darrell Carter, Richard Robinson Smith
  • Patent number: 5641831
    Abstract: A silicone rubber article (such as a wiper blade) has a low process fluid leach rate and high resiliency. The composition comprises, prior to cure, approximately 100 parts by weight of a vulcanizable elastomer including at least one silicone polymer, at least one crosslinkable process fluid, and low pressure and high pressure peroxide catalysts to accommodate a two-stage vulcanization process. According to the invention, the composition provides anti-hazing qualities and confers hydrophobic properties to a contacted surface. The polymer also includes about 50 to 220 parts by weight of a siliceous filler.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 24, 1997
    Assignee: JMK International, Inc.
    Inventor: James R. Hamilton
  • Patent number: 5637629
    Abstract: Reinforced polyolefinic thermoplastic composition comprising a polyolefin, an aluminum and/or magnesium silicate and a maleamic silane.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: June 10, 1997
    Assignee: Enichem S.p.A.
    Inventors: Alessandro Moro, Italo Borghi, Paolo Venti, Domenico Vianello, Roberto Pippa