Patents by Inventor Kirou Yanagimoto

Kirou Yanagimoto 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).

  • Rubber compounding material and composition
    Patent number: 4968764
    Abstract: A rubber compounding material incorporating a cyclopentadiene-based pertroleum resin prepared by thermally copolymerizing 100 parts by weight of a cyclopentadiene-based feed or dicyclopentadiene-based feed with about 5 to 100 parts by weight of an .alpha.-olefin having from 6 to 16 carbon atoms at a temperature of from about 200.degree. to 300.degree. C. for a period of from about 10 minutes to 10 hours in the presence or absence of a solvent.A rubber composition is also disclosed, composed of this rubber compounding material in combination with a diene-based polymer.In rubber compositions for tires, the compounding material and rubber composition of the present invention greatly improve resistance to cutting and chipping of the tread.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: November 6, 1990
    Assignee: Maruzen Petrochemical Co., Ltd.
    Inventors: Suetou Hayashida, Kirou Yanagimoto