Patents by Inventor Ryoji Matunaga

Ryoji Matunaga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Thermoplastic resin composition and its injection molded article
    Patent number: 7268185
    Abstract: Disclosed is a thermoplastic resin composition that contains specific amounts of polypropylene resin (A), elastomer (B), inorganic filler (C) and resin (D) which is composed of 60 to 80% by weight of a first segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 5 dl/g or more and 20 to 40% by weight of a second segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 0.8 to 1.2 dl/g.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: September 11, 2007
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Moriyasu Shimojo, Ryoji Matunaga, Tsuyoshi Watanabe
  • Thermoplastic resin composition and its injection molded article
    Publication number: 20050101738
    Abstract: Disclosed is a thermoplastic resin composition that contains specific amounts of polypropylene resin (A), elastomer (B), inorganic filler (C) and resin (D) which is composed of 60 to 80% by weight of a first segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 5 dl/g or more and 20 to 40% by weight of a second segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 0.8 to 1.2 dl/g.
    Type: Application
    Filed: September 17, 2004
    Publication date: May 12, 2005
    Inventors: Moriyasu Shimojo, Ryoji Matunaga, Tsuyoshi Watanabe