Patents by Inventor Jinich Igarashi

Jinich Igarashi 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).

  • Lubricating oil composition
    Patent number: 5786307
    Abstract: A lubricating oil composition useful for internal combustion engines comprises a base oil, and, as combined therewith, specified amounts of a molybdenum dialkyl-dithiocarbamate, a selected zinc dihydrocarbyl dithiophosphate and a selected copper carboxylate, respectively. The oil composition exhibits a high friction-reducing effect when the oil is fresh and maintains the same effect even after the oil has been deteriorated.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: July 28, 1998
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Jinich Igarashi, Kazuhiro Yagishita, Kiyoshi Azami