Patents by Inventor Kazutoshi Isida

Kazutoshi Isida 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).

  • Heat resistant rubber compositions and belts made therefrom
    Patent number: 5387160
    Abstract: A rubber composition includes hydrogenated acrylonitrile-butadiene rubber (HNBR), a copper dithiocarbamate salt compound and sulfur. The use of the copper dithiocarbamate salt compound results in the vulcanized rubber composition exhibiting improved heat resistance as compared to a rubber material that does not include the copper dithiocarbamate salt compound. Toothed belts and V-ribbed belts can be made using the rubber composition to produce belts exhibiting improved heat resistance.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: February 7, 1995
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Masayoshi Nakajima, Kazutoshi Isida, Kazuhiro Takeda