Patents by Inventor Shinichi Sumiyawa

Shinichi Sumiyawa 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 battery having improved high rate discharge capability
    Patent number: 8343658
    Abstract: A positive electrode 2 and a negative electrode 3 are contained in a battery case 1 with a separator 4 interposed therebetween. The positive electrode 2 contains manganese dioxide and an alkaline electrolyte, and the negative electrode 3 is a gelled negative electrode containing zinc powder, a gelling agent, and an alkaline electrolyte. The zinc powder contains 15% by mass or higher of fine powder with a particle size smaller than 200 mesh, and 10 to 35% by mass of coarse powder with a particle size of 20 to 80 mesh, and has a specific surface area in the range of 0.025 to 0.080 m2/g.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: January 1, 2013
    Assignee: Panasonic Corporation
    Inventors: Shinichi Sumiyawa, Yasuhiko Syoji