Patents by Inventor Sumihiko Makizoe

Sumihiko Makizoe 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 secondary battery-use active matter
    Publication number: 20040137329
    Abstract: A lithium secondary battery-use active matter containing a material capable of electrochemically desorbing and inserting Li, and having a metallic iron grade in the material of less than 5 ppm; and a lithium secondary battery having this active matter. An iron grade in the material of less than 5 ppm can keep a capacity maintaining factor within a high-value range after specified cycles to improve the performance of a lithium secondary battery.
    Type: Application
    Filed: October 10, 2003
    Publication date: July 15, 2004
    Inventors: Kouichi Numata, Sumihiko Makizoe, Shintaro Ishida
  • Manganese-nickel mixed hydroxide for battery active material and process for manufacturing thereof
    Patent number: 6132639
    Abstract: A manganese-nickel mixed hydroxide for battery active material comprising a manganese-containing mixed hydroxide having a coated layer composed of a mixed-oxide of nickel and cobalt, to provide an excellent discharging property and allows one to achieve an improvement in the discharge utilization when it is used as an electrode material for secondary batteries.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: October 17, 2000
    Assignee: Mitsui Mining & Smelting Company, Ltd.
    Inventors: Kazuhito Komatsu, Sumihiko Makizoe, Tsuneyoshi Kamada, Yasuhiro Ochi, Takashi Okito