Patents by Inventor Hidekazu Doi

Hidekazu Doi 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).

  • Hydroen absorbing Ni-based alloy and rechargeable alkaline battery
    Patent number: 4983474
    Abstract: A hydrogen absorbing Ni-based alloy comprising 5 to 25% by weight of titanium (Ti), 10 to 37% by weight of zirconium (Zr), 4 to 20% by weight of manganese (Mn), 0.1 to 12% by weight of vanadium (V), 0.01 to 5% by weight of iron (Fe), 0.01 to 4.5% by weight of aluminum (Al), and balance nickel (Ni) and unavoidable impurities, and a sealed Ni-hydrogen rechargeable battery comprising a negative electrode provided with such a hydrogen absorbing alloy as an active material, an Ni positive electrode, a separator and an alkaline electrolyte solution.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: January 8, 1991
    Assignee: Mitsubishi Metal Corporation
    Inventors: Hidekazu Doi, Ritsue Yabuki
  • Hydrogen absorbing Ni,Zr-based alloy and rechargeable alkaline battery
    Patent number: 4898794
    Abstract: A hydrogen absorbing Ni,Zr-based alloy comprising 5 to 20% by weight of titanium (Ti), 10 to 37% by weight of zirconium (Zr), 5 to 30% by weight of manganese (Mn), 0.01 to 15% by weight of tungsten (W), 6 to 30% by weight of iron (Fe), and optionally at least one of 0.1 to 7% by weight of Cu, 0.05 to 6% by weight of Cr and 0.01 to 5% by weight of Al, and balance nickel (Ni) and unavoidable impurities; and a sealed Ni-hydrogen rechargeable battery comprising a negative electrode provided with a hydrogen absorbing alloy as an active material, an Ni positive electrode, a separator and an alkaline electrolytic solution, wherein the hydrogen absorbing alloy is composed of such hydrogen absorbing Ni,Zr-based alloy.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: February 6, 1990
    Assignee: Mitsubishi Metal Corporation
    Inventors: Hidekazu Doi, Ritsue Yabuki