Patents by Inventor Tamaki Machi

Tamaki Machi 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-nickel complex oxide, a process for preparing the same and a positive electrode active material for a secondary battery
    Patent number: 6045771
    Abstract: There is provided a novel lithium nickel complex oxide represented by the general formula:Li.sub.y-x1 Ni.sub.1-x2 M.sub.x O.sub.2wherein M represents one selected from the group consisting of Al, Fe, Co, Mn and Mg, x=x.sub.1 +x.sub.2, O<x.sub.1 .ltoreq.0.2, O<x.sub.2 .ltoreq.0.5, 0<x.ltoreq.0.5, and 0.9.ltoreq.y.ltoreq.1.3, and wherein the crystals have been sufficiently developed and are highly purified, and a positive electrode active material for a secondary battery whose stability of high discharge capacity is excellent.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: April 4, 2000
    Assignee: Fuji Chemical Industry Co., Ltd.
    Inventors: Yukio Matsubara, Masami Ueda, Tadashi Fukami, Kazumi Fujimori, Tamaki Machi