Patents by Inventor Masatoshi Shirao

Masatoshi Shirao 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).

  • Lithium-containing complex metal oxide, preparation methods thereof, and cathode electroactive material using the same and lithium secondary cells
    Patent number: 6207325
    Abstract: A lithium-containing complex metal oxide having a crystal structure of &agr;-NaFeO2 type and represented by a general formula: LiaNiXCoYAlZO2 wherein 0.96≦a≦1.06, 0.70≦X<0.85, 0.05≦Y≦0.20, 0.10<Z≦0.25, and 0.98≦(X+Y+Z)≦1.02, and further wherein a separation between a peak position of (018) face and a peak position of (110) face in the powder X-ray diffraction pattern of said metal oxide using CuK&agr;-ray is in the range of from 0.520 to 0.700° as expressed in terms of &Dgr;2&thgr;((110)-(018)).
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: March 27, 2001
    Assignee: Showa Denko K.K.
    Inventors: Yasushi Matsui, Masatoshi Shirao