Patents by Inventor Mitsuru Naniwa

Mitsuru Naniwa 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).

  • Sealed battery
    Patent number: 5712056
    Abstract: The present invention provides a sealed battery having a large capacity by using a thin safety valve device so as to increase a volume of a cell element. The sealed battery has a high safety owing to the thin safety valve device having an elastic valve element comprising an ethylene-propylene elastomer and thermoplastic resin particles dispersed in the ethylene-propylene elastomer. The elastic valve element is produced by mixing thermoplastic resin particles with an ethylene-propylene elastomer material, molding the mixture into a predetermined shape and, at the same time, crosslinking the ethylene-propylene elastomer material.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: January 27, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshitaka Matsumasa, Jiro Konagawa, Mitsuru Naniwa, Norio Suzuki, Toshihisa Hiroshima