Patents by Inventor Takayuki Funato

Takayuki Funato 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).

  • Lead-acid battery and manufacturing method thereof
    Patent number: 7635543
    Abstract: A lead-acid battery which comprises a positive electrode, a negative electrode, a separator and an electrolyte, wherein the electrolyte contains volatile organic acid and the content of volatile organic acid is 250 mg or lower per liter of the electrolyte. The present invention can improve the performance of the lead-acid battery.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: December 22, 2009
    Assignee: GS Yuasa Corporation
    Inventors: Takayuki Funato, Junpei Yamashita
  • Lead-acid battery and manufacturing method thereof
    Publication number: 20070077497
    Abstract: A lead-acid battery which comprises a positive electrode, a negative electrode, a separator and an electrolyte, wherein the electrolyte contains volatile organic acid and the content of volatile organic acid is 250 mg or lower per liter of the electrolyte. The present invention can improve the performance of the lead-acid battery.
    Type: Application
    Filed: October 27, 2004
    Publication date: April 5, 2007
    Inventors: Takayuki Funato, Junpei Yamashita
  • Valve-regulated lead-acid battery
    Patent number: 5547783
    Abstract: The present invention provides a valve-regulated lead-acid battery in which the theoretical capacity (Ah) of the negative active material in the battery is less than that of the positive active material, the amount of a conductive additive, such as carbon, added into the negative active material is in the range of 0.5 weight % to 7.5 weight % of the negative active material, and the conductive additive is carbon, acetylene black, polyaniline, tin powder, tin compound powder, etc. having an average particle diameter of 100.mu. or less.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: August 20, 1996
    Assignee: Japan Storage Battery Company, Limited
    Inventors: Takayuki Funato, Katsuhiro Takahashi