Patents by Inventor Yoshinobu Sakai

Yoshinobu Sakai 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).

  • Foamed polyimide shaped article and process for production of same
    Publication number: 20040229969
    Abstract: A foamed polyimide shaped article having heat resistance and molded to any shape obtained by molding and then calcining a mixture of pulverized pieces of a pre-foamed polyimide resin mass and a heat resistant binder and a process for production of the same comprising pulverizing a pre-foamed polyimide resin mass, mixing the pulverized pieces with a heat resistant binder, molding the mixture to a predetermined shape, then calcining it at a temperature of at least 350° C. to cure the binder and strongly bond the polyimide foam mass.
    Type: Application
    Filed: April 21, 2004
    Publication date: November 18, 2004
    Applicant: Ube Industries, Ltd., a Japanese Corporation
    Inventors: Ryoichi Sato, Tatsuo Tsumiyama, Yoshinobu Sakai, Hideki Ozawa, Fumio Aoki