Patents by Inventor Tomoshi NAKAMOTO

Tomoshi NAKAMOTO 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).

  • Positive electrode active material and lithium-ion secondary battery
    Patent number: 9825295
    Abstract: A positive electrode active material contains a compound represented by a chemical formula LiVOPO4. A crystal system of the compound is an orthorhombic system, and the amount of tetravalent V of the compound is 27.7 mass % or more and 28.2 mass % or less.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: November 21, 2017
    Assignee: TDK CORPORATION
    Inventors: Hideaki Seki, Atsushi Sano, Masaki Sobu, Tomoshi Nakamoto
  • Soft magnetic powder core
    Patent number: 9631264
    Abstract: The present invention provides a soft magnetic powder core with a high electrical resistivity and a high strength. The soft magnetic powder core of the present invention is characterized in that in the soft magnetic powder core containing soft magnetic metal particles with Fe as the main component, the powder core has the structure in which oxide portions are present among soft magnetic metal particles, and the oxide portions are composed of oxides containing V, B and Fe. Further, the amount of B contained in the oxide portions of the powder core is 0.5 or more times and 5.0 or less times of the amount of V in terms of mass ratio.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: April 25, 2017
    Assignee: TDK Corporation
    Inventors: Takeshi Takahashi, Tomoshi Nakamoto, Kenichi Nishikawa
  • SOFT MAGNETIC POWDER CORE
    Publication number: 20150187476
    Abstract: The present invention provides a soft magnetic powder core with a high electrical resistivity and a high strength. The soft magnetic powder core of the present invention is characterized in that in the soft magnetic powder core containing soft magnetic metal particles with Fe as the main component, the powder core has the structure in which oxide portions are present among soft magnetic metal particles, and the oxide portions are composed of oxides containing V, B and Fe. Further, the amount of B contained in the oxide portions of the powder core is 0.5 or more times and 5.0 or less times of the amount of V in terms of mass ratio.
    Type: Application
    Filed: December 19, 2014
    Publication date: July 2, 2015
    Inventors: Takeshi TAKAHASHI, Tomoshi NAKAMOTO, Kenichi NISHIKAWA
  • POSITIVE ELECTRODE ACTIVE MATERIAL AND LITHIUM-ION SECONDARY BATTERY
    Publication number: 20140170496
    Abstract: A positive electrode active material contains a compound represented by a chemical formula LiVOPO4. A crystal system of the compound is an orthorhombic system, and the amount of tetravalent V of the compound is 27.7 mass % or more and 28.2 mass % or less.
    Type: Application
    Filed: December 17, 2013
    Publication date: June 19, 2014
    Inventors: Hideaki SEKI, Atsushi SANO, Masaki SOBU, Tomoshi NAKAMOTO