Patents by Inventor Tatsuhiko Kikuchi

Tatsuhiko Kikuchi 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).

  • Catalytic production of a high molecular weight cis-1,4-polyisoprene
    Patent number: 3931136
    Abstract: High molecular weight cis-1,4-polyisoprene is produced by contacting isoprene with a catalyst formed by admixing (A) a titanium tetrachloride, (B) a trihydrocarbylaluminum and (C) a beta-diketone. The activity of this ternary catalyst is not adversely affected by such impurities as cyclopentadiene that are contained in the feed stock isoprene.
    Type: Grant
    Filed: May 23, 1974
    Date of Patent: January 6, 1976
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Kan Mori, Hiroharu Ikeda, Isao Nagaoka, Tooru Shibata, Sigeo Kawatani, Tatsuhiko Kikuchi