Patents by Inventor Norihisa Kusakawa

Norihisa Kusakawa 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).

  • Flame resistant acrylic resin composition and process for its production
    Patent number: 4533689
    Abstract: A flame resistant acrylic resin composition comprising a polymer composed of from 40 to 88% by weight of methyl methacrylate, from 1 to 15% by weight of .alpha.-methyl styrene, from 5 to 15% by weight of styrene, from 5 to 15% by weight of maleic anhydride and from 1 to 15% by weight of methacrylic acid, and a flame retardant.
    Type: Grant
    Filed: August 17, 1983
    Date of Patent: August 6, 1985
    Assignee: Mitsubishi Rayon Company, Limited
    Inventors: Suehiro Tayama, Norihisa Kusakawa
  • Graft-polymer composition of rubber for reinforcing crosslinked resin
    Patent number: 4108946
    Abstract: A thermoplastic graft polymer composition excellent in weather resistance, impact resistance and appearance is obtained by seed-polymerizing 50 to 95 parts by weight of a mixture (b) of 60% by weight or more of at least one acrylic ester, 39.9% by weight or less of at least one monomer copolymerizable therewith and 0.1 to 10% by weight of at least one crosslinking monomer having at least two non-conjugated C .dbd. C bonds in the presence of 5 to 50 parts by weight (solids) of a latex (particle size: 0.04 to 0.24 .mu.) of a crosslinked rigid resin (a) having a glass transition temperature of at least 50.degree. C., a decomposition temperature of at least 240.degree. C.
    Type: Grant
    Filed: May 10, 1973
    Date of Patent: August 22, 1978
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazumasa Kamada, Ryoji Handa, Norihisa Kusakawa, Keita Yamamoto