Patents by Inventor Shuichi Kanagawa

Shuichi Kanagawa 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).

  • Inhibiting ozone deterioration of rubbers
    Patent number: 3978021
    Abstract: Rubbers are prevented from ozone deterioration without discoloring or staining by the addition of low toxic thiodipropionitrile of the formula,N.tbd.C--(CH.sub.2).sub.2 --S--(CH.sub.2).sub.2 --C.tbd.N.
    Type: Grant
    Filed: February 3, 1976
    Date of Patent: August 31, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Seiji Sagawa, Hideo Yamato, Shuichi Kanagawa
  • Inhibiting ozone deterioration of rubbers
    Patent number: 3956234
    Abstract: Rubbers are prevented from ozone deterioration without discoloring or staining by the addition of a low toxic nitrile of the formula, ##EQU1## wherein R.sub.1 is an alkyl or ##EQU2## R.sub.2 is a hydrogen atom or a methyl or ethyl group, and n and a are integers of 1 to 5, with the qualification that when a is an integer of 2, then R.sub.2 is methyl or ethyl.
    Type: Grant
    Filed: January 28, 1974
    Date of Patent: May 11, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Seiji Sagawa, Hideo Yamato, Shuichi Kanagawa