Patents Examined by U. K. Rauguru
  • Patent number: 5409983
    Abstract: Refillable polyethylene terephthalate (PET) bottles are made by injection stretch blow moulding and comprise a threaded neck of transparent amorphous substantially non-oriented PET; a substantially cylindrical body of transparent biaxially oriented amorphous PET from 0.4 to 0.9 mm thick and an area expansion ratio of at least 7; and a base of transparent amorphous substantially non-oriented or partly oriented PET in which the PET is a polyethylene terephthalate polymer randomly modified by replacing from 1 to 6 mole % of the terephthalate units with units of a chain orientation disrupting aromatic dicarboxylic acid, such as iso-phthalic acid, having an Intrinsic Viscosity of at least 0.75. The polymer particularly includes fine metal particles especially of antimony to reduce the reheat, and optionally includes a level of diethylene glycol residues greater than normally present in PET to improve the blowing performance of the polymer.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: April 25, 1995
    Assignee: Imperial Chemical Industries PLC
    Inventors: Kenneth M. Jones, Graeme P. Kerr, Neil Tindale
  • Patent number: 5356994
    Abstract: A hot-vulcanizable, pumpable rubber-based adhesive/sealant where the rubber component is a mixture of butadiene solid rubber and butadiene or isoprene liquid rubber, and wherein the liquid rubber comprises carboxylic acid groups. The adhesive/sealant compositions of the invention are particularly useful for bonding metal sheeting in the construction of automobile shells.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: October 18, 1994
    Assignee: Bostik, Inc.
    Inventor: Markus Koch
  • Patent number: 5268410
    Abstract: A resin composition of wholly-aromatic thermotropic liquid crystal polyester resin containing 5 to 60% by weight of an inorganic filler selected from carbonates of alkaline earth metals, which is characterized in that the moisture content of the component materials to be fed to the melting step in preparation process of said composition is 0.1% by weight or lower. The resin composition and its formed articles are quite excellent in external appearance, thermal resistance, workability in plastics forming and especially in plating strength suitable for applying metal plating thereon.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: December 7, 1993
    Assignee: Nippon Petrochemicals Company, Limited
    Inventors: Jun Yamada, Hideo Watanabe, Tetsuo Shimizu
  • Patent number: 5256709
    Abstract: A sheet molding composition is disclosed which includes a four component resinous system which comprises (a) an unsaturated polyester comprising a polycondensation product of one or more dihydric alcohols and one or more ethylenically unsaturated polycarboxylic acids; (b) one or more low-profile additives which are thermoplastic polymers which cause phase separation and porosity during the curing reaction; (c) one or more olefinically unsaturated monomers which copolymerize with the unsaturated polyester; and, (d) one or more compatible components comprising at least one compound containing one or more aromatic substituents. The compatible components are compatible with the reacted unsaturated polyester and monomer during cure and impart improved surface characteristics when added to low-profile resin systems.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: October 26, 1993
    Assignee: Owens-Corning Fiberglas Technology, Inc.
    Inventors: Louis R. Ross, Edward L. Wilson
  • Patent number: 5244956
    Abstract: A corrosion and crack growth inhibitor is disclosed, the inhibitor being relatively non-toxic as well as unreactive with curable elastomeric materials so as to form a coating composition for application to metal surfaces. The inhibitor comprises a curable polymer material, such as epoxy polyamide, and cerous molybdate in the amount of from about 1 to 15 percent by weight of the inhibitor.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: September 14, 1993
    Assignee: Lockheed Corporation
    Inventor: Robert N. Miller