Patents by Inventor Syoji Uchimura

Syoji Uchimura 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).

  • Method of toughening and modifying ceramic and ceramic products
    Patent number: 6884386
    Abstract: When a sintered body of ceramic is shot-blasted at normal temperatures to plastically deform the crystal structure of the shot-blasted surface to apply residual stress and is heat-treated to recrystallize fine cracks, dislocated cells in the grain boundary are formed, crystals are finely divided, and the fracture toughness is significantly improved. When the sintered body of ceramic is a thin product, an effective toughening can be attained by shot blasting both the front and back sides. After heat treatment, mechanical strength is significantly improved by removing a part of the modified surface layer by an abrasion treatment.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: April 26, 2005
    Assignees: Sintokogio, Ltd., Sinto V-Cerax, Ltd.
    Inventors: Hiroyasu Saka, Syoji Uchimura, Hideki Morimitsu
  • Sintering method and apparatus using centrifugal force
    Patent number: 6663828
    Abstract: A method and an apparatus for sintering a compact of particulate material for a ceramic or of particles of a metal, or a ceramic precursor film, wherein the sintering is performed by heating and burning the compact or the ceramic precursor film while applying centrifugal force to the compact or the ceramic precursor film.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: December 16, 2003
    Assignees: National Institute of Advanced Industrial Science and Technology, Sinto V-Cerax, Ltd.
    Inventors: Koji Watari, Mamoru Aizawa, Syoji Uchimura, Hirohide Ishiguro, Hideki Morimitsu
  • Method of toughening and modification of ceramic and ceramic product
    Publication number: 20030162483
    Abstract: When a sintered body of ceramic is shot-blasted at normal temperatures to plastically deform the crystal structure of the shot-blasted surface to apply residual stress and is heat-treated to recrystallize fine cracks, dislocated cells in the grain boundary are formed, crystals are finely divided, and the fracture toughness is significantly improved. When the sintered body of ceramic is a thin product, an effective toughening can be attained by shot blasting both the front and back sides. After heat treatment, mechanical strength is significantly improved by removing a part of the modified surface layer by an abrasion treatment.
    Type: Application
    Filed: March 20, 2003
    Publication date: August 28, 2003
    Inventors: Hiroyasu Saka, Syoji Uchimura, Hideki Morimitsu
  • Sintering method and apparatus using centrifugal force
    Publication number: 20020110475
    Abstract: A method and an apparatus for sintering a compact of particulate material for a ceramic or of particles of a metal, or a ceramic precursor film, wherein the sintering is performed by heating and burning the compact or the ceramic precursor film while applying centrifugal force to the compact or the ceramic precursor film.
    Type: Application
    Filed: December 21, 2001
    Publication date: August 15, 2002
    Inventors: Koji Watari, Mamoru Aizawa, Syoji Uchimura, Hirohide Ishiguro, Hideki Morimitsu