Patents by Inventor Sachio Nagata

Sachio Nagata 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 treating the surface of titanium
    Patent number: 5466305
    Abstract: The surface of titanium is treated to reduce the friction coefficient and wear loss without sacrificing its corrosion resistance. Pure titanium or titanium alloy is subjected to plasma-carburizing in an atmosphere containing hydrocarbon gas at a pressure of 0.5 to 15 Torr and a temperature of 700.degree. to 1100.degree. C.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: November 14, 1995
    Assignees: Tanaka Limited, Osaka Prefecture
    Inventors: Yukihiro Sato, Takumi Sone, Sachio Nagata, Tetsuhiro Sakata, Kei Demizu, Shinichi Tanaka
  • Method of carbon nitriding a metal workpiece
    Patent number: 4193825
    Abstract: In an ion nitriding method, a mixture of CO or CO.sub.2 and nitrogen is compressed and then admitted into an evacuated discharge furnace. The furnace is heated to 400.degree. C. to 600.degree. C. for two hours for carbonitriding a workpiece. Depending upon the type of the workpiece, up to 30 volume percent of hydrogen is admixed with the mixture.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: March 18, 1980
    Assignees: Kayaba Industry Co., Ltd., Nihon Denshi Kogyo Kabushiki Kaisha
    Inventors: Rinzo Kojima, Kazuhiro Shibata, Sachio Nagata