Patents by Inventor Tomokazu Mitamura

Tomokazu Mitamura 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).

  • Patent number: 5273843
    Abstract: The present invention relates to a separator and spacer for use in non-aqueous inorganic electrolyte cells using oxyhalides as both a solvent and cathode active material, and an alkali metal as anode active material. There is provided a non-aqueous inorganic electrolyte cell which has a good discharge performance, preservability, and a safety to resist the charging at 5 V caused due to erroneous operations and accidents, by specifying a content of glass involved in the separator made of mainly glass fibers, specifying the type of synthetic resin of other components than glass fibers, or by specifying an oxyhalide absorbance of materials from which the separator and the spacer are produced.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: December 28, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Fukuda, Shigeo Kobayashi, Kenichi Morigaki, Syuichi Nishino, Tomokazu Mitamura
  • Patent number: 4997730
    Abstract: The invention relates to a nonaqueous electrochemical cell comprising an alkali metal anode, an oxyhalide or other cathode-electrolyte solvent which is liquid at ambient temperature, and a porous carbonaceous cathode collector, the cathode-electrolyte containing at least polyethylene terephthalate as an additive for minimizing the voltage delay, i.e. a large voltage drop in an initial stage of discharge.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: March 5, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Morigaki, Shigeo Kobayashi, Hiroshi Fukuda, Shuichi Nishino, Tomokazu Mitamura