Patents by Inventor Tomomasa Ohsumi

Tomomasa Ohsumi 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, and fluid composition for refrigerating machine
    Patent number: 6936576
    Abstract: A refrigerating machine oil for a carbon dioxide refrigerant according to the invention is a refrigerating machine oil comprising polyalkylene glycol represented by the following general formula (1): R1{—(OR2)n—OH}m??(1) [where R1 represents a residue of an organic compound having a hydroxyl group, from which the hydroxyl group has been removed, R2 an alkylene group, and m and n respective integers], wherein a number average molecular weight of the polyalkylene glycol is not less than 500 nor more than 5000, wherein a rate of ethylene group among the alkylene group in the polyalkylene glycol is more than 0 and not more than 80 mol %, and wherein a rate of molecules in which the alkylene group bonded to a terminal hydroxyl group in the polyalkylene glycol is an ethylene group, is not more than 20 mol %.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: August 30, 2005
    Assignee: Nippon Mitsubishi Oil Corporation
    Inventors: Tomomasa Ohsumi, Katsuya Takigawa
  • Refrigerating machine oil, and fluid composition for refrigerating machine
    Publication number: 20020115577
    Abstract: A refrigerating machine oil for a carbon dioxide refrigerant according to the invention is a refrigerating machine oil comprising polyalkylene glycol represented by the following general formula (1):
    Type: Application
    Filed: October 16, 2001
    Publication date: August 22, 2002
    Inventors: Tomomasa Ohsumi, Katsuya Takigawa
  • Refrigerating machine oil for carbon dioxide refrigerant and fluid composition for refrigerating machine
    Publication number: 20020098993
    Abstract: A refrigerating machine oil for a carbon dioxide refrigerant according to the present invention contains polyalkylene glycol represented by the following general formula (1):
    Type: Application
    Filed: November 21, 2001
    Publication date: July 25, 2002
    Applicant: Nippon Mitsubishi Oil Corporation
    Inventors: Tomomasa Ohsumi, Katsuya Takigawa