Patents by Inventor Mamoru Asuwa

Mamoru Asuwa 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).

  • Sintered silicon carbide with graphite added thereto, sintered composite containing the same, and mechanical seal
    Patent number: 5998318
    Abstract: There is provided a sintered silicon carbide with graphite added thereto having excellent lubrication characteristics. The sintered silicon carbide with graphite added thereto contains 10-30 wt. % of natural graphite flakes having an average grain size of 8-100 .mu.m and the remainder silicon carbide and a sintering aid, and having a relative density of 80-92%.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: December 7, 1999
    Assignees: Tanken Seal Seiko Co., Ltd., Syowa Denko K.K.
    Inventors: Hiroshi Takanami, Yukio Ishii, Mamoru Asuwa