Patents by Inventor Takemi Oguma

Takemi Oguma 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).

  • Spherical boron nitride fine powder, method for manufacturing same and thermally conductive resin composition using same
    Patent number: 10752503
    Abstract: The present invention provides a spherical boron nitride fine powder and the other superior in filling property into resin. The present invention relates to a spherical boron nitride fine powder having the following characteristics (A) to (C): (A) the spherical boron nitride fine particles have any one or more of Si, Ti, Zr, Ce, Al, Mg, Ge, Ga, and V in an amount of 0.1 atm % or more and 3.0 atm % or less in its composition on the surface of 10 nm; (B) the spherical boron nitride fine powder has an average particle diameter of 0.05 ?m or more and 1 ?m or less; and (C) the spherical boron nitride fine powder has an average circularity of 0.8 or more.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: August 25, 2020
    Assignee: DENKA COMPANY LIMITED
    Inventors: Go Takeda, Yoshitaka Taniguchi, Takemi Oguma
  • SPHERICAL BORON NITRIDE FINE POWDER, METHOD FOR MANUFACTURING SAME AND THERMALLY CONDUCTIVE RESIN COMPOSITION USING SAME
    Publication number: 20200048091
    Abstract: The present invention provides a spherical boron nitride fine powder and the other superior in filling property into resin. The present invention relates to a spherical boron nitride fine powder having the following characteristics (A) to (C): (A) the spherical boron nitride fine particles have any one or more of Si, Ti, Zr, Ce, Al, Mg, Ge, Ga, and V in an amount of 0.1 atm % or more and 3.0 atm % or less in its composition on the surface of 10 nm; (B) the spherical boron nitride fine powder has an average particle diameter of 0.05 ?m or more and 1 ?m or less; and (C) the spherical boron nitride fine powder has an average circularity of 0.8 or more.
    Type: Application
    Filed: August 31, 2017
    Publication date: February 13, 2020
    Inventors: Go TAKEDA, Yoshitaka TANIGUCHI, Takemi OGUMA
  • Phosphor-containing resin composition and sheet, and light emitting devices employing them
    Patent number: 8497623
    Abstract: Provided is a phosphor for a white light emitting device with a blue to ultraviolet light as a light source. A phosphor-containing resin composition comprising phosphor particles of at least one member selected from the group consisting of a nitride and an oxynitride, and a resin of at least one member selected from the group consisting of an epoxy resin, a silicone resin and a fluorine-containing resin.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: July 30, 2013
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takemi Oguma, Masahiro Ibukiyama, Tsuguo Hasegawa
  • Resin Composition and Sheet Containing Phosphor, and Light Emitting Element Using Such Composition and Sheet
    Publication number: 20090085464
    Abstract: Provided is a phosphor for a white light emitting device with a blue to ultraviolet light as a light source. A phosphor-containing resin composition comprising phosphor particles of at least one member selected from the group consisting of a nitride and an oxynitride, and a resin of at least one member selected from the group consisting of an epoxy resin, a silicone resin and a fluorine-containing resin.
    Type: Application
    Filed: June 14, 2006
    Publication date: April 2, 2009
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Takemi Oguma, Masahiro Ibukiyama, Tsuguo Hasegawa