Patents by Inventor Humihiko Takei

Humihiko Takei 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).

  • Superconductive oxide crystal and a production process thereof
    Patent number: 4952390
    Abstract: This invention concerns a novel superconductive oxide crystal and a production process thereof, the novel superconductive oxide crystal comprising a superconductive oxide crystal composed of a rare earth element, an alkaline earth meal, copper, and oxygen, in which copper (II) oxide (CuO)) is dispersed like detached islands.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: August 28, 1990
    Assignees: Humihiko Takei, Ibiden Co., Ltd.
    Inventors: Humihiko Takei, Hiroyuki Takeya
  • Method of preparing sintered shapes of silicon carbide
    Patent number: 4564490
    Abstract: A series of sintered shapes of silicon carbide of high strength comprising 0.027 to 11.300 atomic percent of one or more members of rare earth oxides and the balance of silicon carbide are disclosed. Method of making such silicon carbide shapes is also disclosed.
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: January 14, 1986
    Assignee: Mamoru Omori
    Inventors: Mamoru Omori, Humihiko Takei
  • Composite silicon carbide sintered shapes and its manufacture
    Patent number: 4502983
    Abstract: A composite silicon carbide sintered shape is provided in two forms in which the former form includes rare earth oxides as a sintering assist, and the latter form includes rare earth oxides and/or aluminum oxide or boron oxide as a sintering assist, characterized in that both forms have a surface layer abundant in rare earth oxides. Methods for manufacturing such sintered shapes are also provided.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: March 5, 1985
    Assignee: Mamoru Omori
    Inventors: Mamoru Omori, Humihiko Takei