Patents by Inventor Katsutoshi Hanawa

Katsutoshi Hanawa 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).

  • Wire on cable coated with a bow-tie tree resistant electrical insulating composition
    Patent number: 5420185
    Abstract: A bow-tie tree resistant electrical insulating composition comprises 100 parts by weight of at least one polymer selected from polyolefins and ethylene copolymers, 0.005-1.0 part by weight of a metal salt of a fatty acid containing a hydroxyl group in the molecule, and 0.005-1.0 part by weight of a fatty acid or a derivative thereof.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: May 30, 1995
    Assignee: Hitachi Cable Ltd.
    Inventors: Kiyoshi Watanabe, Takanori Yamazaki, Hideki Yagyu, Mamoru Kanaoka, Katsutoshi Hanawa, Chuki Ikeda
  • Semiconductor resin composition
    Patent number: 4909960
    Abstract: A semiconductive resin composition comprising 100 parts by weight of a polymer component comprising an ethylene-based copolymer, an ethylene-propylene rubber, and a low molecular weight polyethylene having an average molecular weight of 1,000 to 4,000 and 40 parts by weight or more of electroconductive carbon black.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: March 20, 1990
    Assignee: Hitachi Cable Ltd.
    Inventors: Kiyoshi Watanabe, Toshio Shiina, Yukio Shimazaki, Hideki Yagyu, Katsutoshi Hanawa, Moritada Marumo