Patents by Inventor Iwao Shirai

Iwao Shirai 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).

  • Alkaline galvanic cell
    Patent number: 4401733
    Abstract: An improved alkaline galvanic cell which includes an anode sealing plate of a layered structure serving as an anode terminal and having a copper layer as the innermost layer, a cathode container serving as a cathode terminal, an insulating packing provided around the peripheral edge of the anode sealing plate to be fitted into the cathode container for hermetically sealing the cell, and two layers of sealing agents provided between the anode sealing plate and the insulating packing. One of the layers at the side of the anode sealing plate is of epoxy adduct polyamide amine having amine valence in the range of 50 to 400, while the other of the layers at the side of the insulating packing is arranged to be of chlorosulfonated polyethylene for improvement of resistance against leakage of electrolyte.
    Type: Grant
    Filed: December 22, 1981
    Date of Patent: August 30, 1983
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Iwao Shirai, Keigo Momose, Tadashi Sawai, Masakazu Komatsu, Takao Inoue, Tamotsu Wakahata