Patents by Inventor Hiroshi Yoshsii

Hiroshi Yoshsii 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).

  • Vulcanizable rubber composition having improved physical properties
    Patent number: 3941732
    Abstract: A stiffener, 3,9-(2-hydrazidoethyl)-2,4,8,10-tetraoxaspiro-[5,5]-undecane, is used for improving physical properties of rubber compositions.
    Type: Grant
    Filed: December 12, 1974
    Date of Patent: March 2, 1976
    Assignee: Bridgestone Tire Company Limited
    Inventors: Toshio Yukuta, Takashi Ohashi, Hiroshi Yoshsii