Patents by Inventor Takamasa Onoki

Takamasa Onoki 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).

  • Tungsten carbide powder and production method therefor
    Patent number: 11396451
    Abstract: A tungsten carbide powder contains tungsten carbide as a main component and chromium, in which, when mass concentrations of tungsten and chromium are measured at 100 or more analysis points randomly selected from a field of view of SEM observation of the tungsten carbide powder, a standard deviation ? of distribution of the ratio by percentage of the concentration of chromium to the total concentration of tungsten and chromium is 0.5 or less.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: July 26, 2022
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Masato Michiuchi, Takamasa Onoki, Katsumi Okamura, Takayuki Fudo, Takehiko Hayashi
  • Tungsten carbide powder
    Patent number: 11339096
    Abstract: A tungsten carbide powder 1 includes bonded bodies 10 each including a plurality of tungsten carbide crystal grains 11, in which the bonded bodies 10 include, at a grain boundary 11a between the plurality of tungsten carbide crystal grains 11, a chromium-concentrated region 12 which has a chromium concentration higher than that in the tungsten carbide crystal grains 11.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: May 24, 2022
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Masato Michiuchi, Takamasa Onoki, Katsumi Okamura, Takayuki Fudo, Takehiko Hayashi
  • TUNGSTEN CARBIDE POWDER
    Publication number: 20220144708
    Abstract: A tungsten carbide powder 1 includes bonded bodies 10 each including a plurality of tungsten carbide crystal grains 11, in which the bonded bodies 10 include, at a grain boundary 11a between the plurality of tungsten carbide crystal grains 11, a chromium-concentrated region 12 which has a chromium concentration higher than that in the tungsten carbide crystal grains 11.
    Type: Application
    Filed: April 21, 2020
    Publication date: May 12, 2022
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Masato MICHIUCHI, Takamasa ONOKI, Katsumi OKAMURA, Takayuki FUDO, Takehiko HAYASHI
  • TUNGSTEN CARBIDE POWDER AND PRODUCTION METHOD THEREFOR
    Publication number: 20220089447
    Abstract: A tungsten carbide powder contains tungsten carbide as a main component and chromium, in which, when mass concentrations of tungsten and chromium are measured at 100 or more analysis points randomly selected from a field of view of SEM observation of the tungsten carbide powder, a standard deviation ? of distribution of the ratio by percentage of the concentration of chromium to the total concentration of tungsten and chromium is 0.5 or less.
    Type: Application
    Filed: April 21, 2020
    Publication date: March 24, 2022
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Masato MICHIUCHI, Takamasa ONOKI, Katsumi OKAMURA, Takayuki FUDO, Takehiko HAYASHI
  • Aqueous Solution Composition and Method for Manufacturing the Same, Oxide Powder and Method for Manufacturing the Same, Carbide Powder and Method for Manufacturing the Same, and Cemented Carbide and Method for Manufacturing the Same
    Publication number: 20190194784
    Abstract: An aqueous solution composition contains more than or equal to 10 mass % and less than or equal to 30 mass % of tungstate ions relative to 1 kg of water, more than or equal to 0.05 mass % and less than or equal to 5 mass % of transition metal ions relative to 1 kg of water, and a remainder of counter anions and water. The transition metal ions include cobalt ions. The counter anions include organic acid ions. The organic acid ions are multidentate ligands.
    Type: Application
    Filed: July 19, 2017
    Publication date: June 27, 2019
    Inventors: Takamasa Onoki, Hideaki Awata