Patents by Inventor Yoshihisa Tsubokura

Yoshihisa Tsubokura 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).

  • Heat-resistant CPVC resin composition
    Patent number: 4590232
    Abstract: A postchlorinated polyvinyl chloride composition having high processability for preparing molded products of outstanding properties comprises postchlorinated polyvinyl chloride and a copolymer of methyl methacrylate and a styrene monomer blended with the chloride. The composition has good thermal fluidity with good releasability from metal surface in processing and gives molded products of a high softening point and outstanding transparency.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: May 20, 1986
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Tsubokura, Sumio Yamamoto, Eiji Aoishi, Tamio Fujita