Patents by Inventor Komei Matsumoto

Komei Matsumoto 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).

  • Metal working oil composition
    Patent number: 5908816
    Abstract: The present invention is directed to a metal working oil composition comprising the following components (A), (B), and (C), and optionally (D):(A): a lubrication base oil,(B): 0.1-30% by weight of an overbasic alkaline earth metal sulfonate with respect to the total weight of the composition,(C): 0.1-30% by weight of an overbasic alkali metal sulfonate with respect to the total weight of the composition, and(D): 0-30% by weight of a sulfur-containing extreme-pressure agent.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: June 1, 1999
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Masahiro Kobessho, Komei Matsumoto