Patents by Inventor Shigeo Tamai

Shigeo Tamai 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).

  • Grease composition
    Patent number: 5254273
    Abstract: A grease composition comprises a base oil and a particular amount of at least one intercalation compound consisting of a metal phosphorus chalcogenide as a host and an alkylamine or alkylammonium chloride as a guest, and has excellent extreme pressure property and wear resistance.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: October 19, 1993
    Assignee: Kyodo Yushi Co., Ltd.
    Inventors: Hachiro Kageyama, Shoji Yamanaka, Shigeo Tamai