Patents by Inventor Masayoshi Kariya

Masayoshi Kariya 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).

  • Ethylene polymers or copolymers having improved insulating properties, compositions, and power cables made therefrom
    Patent number: 5304619
    Abstract: A polar group-containing ethylene polymer or copolymer having improved insulating properties, or a composition thereof is characterized in that said polar group-containing ethylene polymer or copolymer contains 20 to 8000 ppm of a polar group having a dipole moment of more than 0.8 debye. The polymer can be used in a power cable as insulation.
    Type: Grant
    Filed: June 4, 1991
    Date of Patent: April 19, 1994
    Assignee: Nippon Petrochemicals Co., Ltd.
    Inventors: Junichi Yokoyama, Hideo Kawabata, Masaaki Ikeda, Katsufumi Suga, Masayoshi Kariya
  • Flame-retardant olefin polymer composition
    Patent number: 4845146
    Abstract: A flame-retardant olefin polymer composition containing 100 parts by weight of a resin component, said resin component consisting essentially of the following (a) and (b):(a) 60-99% by weight of a copolymer of ethylene and a carboxyl-containing monomer or a derivative thereof and(b) 1-40% by weight of an olefin polymer modified with an unsaturated carboxylic acid or a derivative thereof; and(c) 20-200 parts by weight of an inorganic flame retardant.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: July 4, 1989
    Assignee: Nippon Petrochemicals Company, Limited
    Inventors: Takashi Inoue, Masazi Sunada, Motohide Okamoto, Masayoshi Kariya, Tadashi Inoh