Patents by Inventor Tadashi Shiroya

Tadashi Shiroya 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 having tin in positive active material and silica in separator
    Patent number: 6495288
    Abstract: In a lead-acid battery, a positive active material includes tin in an amount of from not less than 0.2% to not more than 5% based on the weight thereof. The density of the positive active material after formation is from not less than 3.75 g/cc to not more than 5.0 g/cc. When the lead-acid battery is produced by a battery container formation, a time required between the injection of an electrolyte and the beginning of battery container formation is from not less than 0.1 hours to not more than 3 hours.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: December 17, 2002
    Assignee: Japan Storage Battery Co., Ltd.
    Inventors: Masaaki Shiomi, Yuichi Okada, Tadashi Shiroya
  • Lead-acid battery and producing method thereof
    Patent number: 6225005
    Abstract: In a lead-acid battery, a positive active material includes tin in an amount of from not less than 0.2% to not more than 5% based on the weight thereof. The density of the positive active material after formation is from not less than 3.75 g/cc to not more than 5.0 g/cc. When the lead-acid battery is produced by a battery container formation, a time required between the injection of an electrolyte and the beginning of battery container formation is from not less than 0.1 hours to not more than 3 hours.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: May 1, 2001
    Assignee: Japan Storage Battery Co., Ltd.
    Inventors: Masaaki Shiomi, Yuichi Okada, Tadashi Shiroya
  • Lead-acid battery and producing method thereof
    Publication number: 20010000239
    Abstract: In a lead-acid battery, a positive active material includes tin in an amount of from not less than 0.2% to not more than 5% based on the weight thereof. The density of the positive active material after formation is from not less than 3.75 g/cc to not more than 5.0 g/cc. When the lead-acid battery is produced by a battery container formation, a time required between the infection of an electrolyte and the beginning of battery container formation is from not less than 0.1 hours to not more than 3 hours.
    Type: Application
    Filed: December 5, 2000
    Publication date: April 12, 2001
    Inventors: Masaaki Shiomi, Yuichi Okada, Tadashi Shiroya