Patents by Inventor Yoshikazu Umezu

Yoshikazu Umezu 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 production of ceramics
    Patent number: 6777001
    Abstract: Spherical-shape ceramics obtained by dropping starting ceramics into a low temperature medium or composite spherical-shape ceramics having a composite layer obtained by applying a hydrothermal treatment thereto.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: August 17, 2004
    Assignee: Kabushiki Kaisya Advance
    Inventors: Yoshikazu Umezu, Takehiko Arai
  • Process for producing ceramics
    Publication number: 20020006427
    Abstract: Spherical-shape ceramics obtained by dropping starting ceramics into a low temperature medium or composite spherical-shape ceramics having a composite layer obtained by applying a hydrothermal treatment thereto.
    Type: Application
    Filed: August 31, 2001
    Publication date: January 17, 2002
    Applicant: KABUSHIKI KAISHA ADVANCE
    Inventors: Yoshikazu Umezu, Takehiko Arai
  • .alpha.-tricalcium phosphate ceramic and production method thereof
    Patent number: 5679294
    Abstract: A high purity .alpha.-tricalcium phosphate ceramic having a superior biocompatibility for use mainly as a bone filler, is produced by shaping a powder material formed by a wet method, followed by sintering it and then cooling at a predetermined rate.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: October 21, 1997
    Assignee: Kabushiki Kaisya Advance
    Inventors: Yoshikazu Umezu, Osamu Hayashi, Kazutaka Yoshizawa