Patents by Inventor Tomomasa Osumi

Tomomasa Osumi 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).

  • Refrigerating machine oil
    Patent number: 6692654
    Abstract: Refrigerating machine oils comprising an ester oil for use with a refrigerant containing carbon dioxide are described. The refrigerating machine oils have excellent lubricity, miscibility with a refrigerant, stability and electric insulation.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: February 17, 2004
    Assignee: Nippon Mitsubishi Oil Corporation
    Inventors: Tomomasa Osumi, Hiroyuki Hirano, Yasuyuki Watanabe
  • Refrigerating machine oil
    Publication number: 20020123436
    Abstract: Refrigerating machine oils comprising an ester oil for use with a refrigerant containing carbon dioxide are described. The refrigerating machine oils have excellent lubricity, miscibility with a refrigerant, stability and electric insulation.
    Type: Application
    Filed: February 28, 2002
    Publication date: September 5, 2002
    Applicant: Nippon Mitsubishi Oil Corporation
    Inventors: Tomomasa Osumi, Hiroyuki Hirano, Yasuyuki Watanabe
  • Hydraulic working oil composition for buffers
    Patent number: 5549838
    Abstract: A hydraulic working oil composition for buffers which comprises:a lubricating oil as a base oil,[I] at least one phosphorus-containing compound selected from the group consisting of a phosphoric acid having a specific structure and a phosphorous acid ester having a specific structure, and[II] at least one nitrogen-containing compound selected from the group consisting of an alkyleneoxide adduct of an aliphatic monoamine having a specific structure, an aliphatic polyamine having a specific structure and a salt of the above aliphatic polyamine having a specific structure, and[III] an aliphatic monoamine having a specific structure, the components [I] to [III] being essential components added to said base oil in a predetermined ratio; and a process for lubricating buffers with said hydraulic working oil composition.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: August 27, 1996
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Toru Miyagawa, Mitsuo Okada, Tomomasa Osumi