Patents by Inventor Ryuichi Simizu

Ryuichi Simizu 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).

  • Resin compositions containing polyepoxides and uretdiones
    Patent number: 4138372
    Abstract: A polymerizable, curable resin composition suitable for molding materials, prepreg, powdery paint materials or the like, which comprises a polyepoxide, a uretdione and a tetraphenyl borate-amine complex. This composition has long pot life and good curability by virtue of latent catalytic characteristics of the complex.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: February 6, 1979
    Assignee: Hitachi, Ltd.
    Inventors: Akio Nishikawa, Hitoshi Yokono, Ryuichi Simizu, Junji Mukai