Patents by Inventor Kiyomori Oura

Kiyomori Oura 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).

  • Process for hydrogenating conjugated diene polymers
    Patent number: 4510293
    Abstract: A process for catalytically hydrogenating a carbon-carbon double bond of a conjugated diene polymer by introducing hydrogen in the solution of said polymer, characterized in that a palladium salt of a carboxylic acid is used as a catalyst.
    Type: Grant
    Filed: December 13, 1983
    Date of Patent: April 9, 1985
    Assignee: Nippon Zenn Co. Ltd.
    Inventors: Yoichiro Kubo, Takaaki Kohtaki, Kiyomori Oura
  • Process for hydrogenating conjugated diene polymers
    Patent number: 4452951
    Abstract: In a process for hydrogenating a conjugated diene polymer which comprises hydrogenating the carbon-carbon double bonds of the conjugated diene polymer using a hydrogenation catalyst supported on a carrier, the improvement wherein the carrier is porous silica having an average pore diameter of from 80 to 1,200 .ANG. and a specific surface area of not more than 600 m.sup.2 /g.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: June 5, 1984
    Assignee: Nippon Zeon Co. Ltd.
    Inventors: Yoichiro Kubo, Kiyomori Oura