Patents by Inventor Shigeru Ooyama

Shigeru Ooyama 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).

  • Active material for negative poles of alkaline dry cells, and method for making said material
    Patent number: 4592974
    Abstract: Novel active materials for negative poles in alkaline dry cells, and method of preparing the same are disclosed. Said materials and method do not employ harmful Hg. In place of Hg, an alloy containing at least three elements selected from Bi, Pb, In, Cd, and Ga is used to have a zinc dust alloyed at its outer surfaces with said alloy elements which are afforded with a high hydrogen overvoltage effective to retard the generation of hydrogen due to self erosion of the zinc dust in an alkaline solution of the dry cells.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: June 3, 1986
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Ryuzo Takeda, Shigeru Ooyama, Yukio Ishibashi