Patents by Inventor Atsuhisa Kobori

Atsuhisa Kobori 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).

  • Heat resistant lubricating oil composition
    Patent number: 6586376
    Abstract: A heat resistant lubricating oil composition which exhibits high heat resistance and oxidation resistance under high temperature conditions, and can withstand severe working conditions, as in jet engine turbines. The lubricating oil composition comprises a polyphenylthioether of formula I in a lubricating base oil, comprising any one of a polyol ester, a polyphenyl ether, an organopolysiloxane and mixtures thereof.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: July 1, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Hiroshi Nakanishi, Ko Onodera, Makoto Kanbara, Atsuhisa Kobori, Yoshinobu Nakamura
  • Lubricant oil composition
    Patent number: 6245719
    Abstract: The present invention is a lubricant oil composition comprising a base oil as the major component which contains aromatic compounds at 1 wt % or less and paraffin and monocyclic naphthene compounds at 50 wt % or more as total content, and has a kinematic viscosity of 2 to 50 mm2/s at 100° C. and evaporated quantity of 16 wt % or less by the NOACK volatility test.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: June 12, 2001
    Assignee: Tonen Corporation
    Inventor: Atsuhisa Kobori
  • Heat resistant lubricating oil composition
    Patent number: 6191080
    Abstract: A heat resistant lubricating oil composition which exhibits high heat resistance and oxidation resistance under high temperature conditions, and can withstand severe working conditions, as in jet engines or gas turbines. The lubricating oil composition comprises a polyphenylthioether of formula {I} in a lubricating base oil, comprising any one of a polyol ester, dibasic acid ester, a polyphenyl ether, an organopolysiloxane and admixtures thereof.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: February 20, 2001
    Assignee: Tonen Corporation
    Inventors: Hiroshi Nakanishi, Ko Onodera, Makoto Kanbara, Atsuhisa Kobori, Yoshinobu Nakamura