Patents by Inventor Toshikaju Umemura

Toshikaju Umemura 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).

  • Acetal resin composition
    Patent number: 4578422
    Abstract: This invention relates to a glass-reinforced acetal resin composition having excellent heat stability and mechanical strength. The resin composition contains both a polycyanate compound and an amino-substituted triazine and/or a cyanoguanidine compound as coupling agents. The resin composition of the invention is useful, for example, as a material for automotive parts and machine parts because of its higher mechanical strength and heat stability, especially the former, than conventional known glass-reinforced acetal resins.
    Type: Grant
    Filed: May 23, 1984
    Date of Patent: March 25, 1986
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Masanori Sakurai, Junichi Miyawaki, Toshikaju Umemura, Toshikatsu Kawata, Shinji Kiboshi