Patents by Inventor Harauo Sawa

Harauo Sawa 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).

  • Preparing method for a nickel hydroxide for a nickel electrode, a manufacturing method for the nickel electrode, and an alkaline secondary battery incorporating the nickel electrode therein
    Patent number: 5549992
    Abstract: Provided are a method for preparing a nickel hydroxide for a nickel electrode, which comprises solidly dissolving ions of other metals than nickel in a nickel hydroxide, and eluting a partial amount of the metal, a method for manufacturing a nickel electrode, which comprises filling a porous current collector with an active material paste consisting mainly of the resulting nickel hydroxide, and an alkaline secondary battery which incorporates the nickel electrode as a positive electrode therein. This nickel hydroxide restrains deformation or expansion of the nickel electrode and lowering of the discharge capacity of the battery despite repeated charge/discharge cycles of the battery.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: August 27, 1996
    Assignee: Furukawa Denchi Kabushiki Kaisha
    Inventors: Noriyasu Iwane, Harauo Sawa