Patents by Inventor Tomohiro Magome

Tomohiro Magome 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).

  • Lubricant compositions for refrigerating machine employing HFC-32, HFC-125 or HFC-134A
    Patent number: 6221274
    Abstract: A lubricant composition for a refrigerating machine employing a HFC type refrigerant containing at least one selected from the group consisting of HFC-32, HFC-125 and HFC-134a, which comprises a base oil of an ester formed from a dihydric or higher polyol as an alcohol and a monobasic aliphatic acid, alone or as a mixture thereof; and additives of, based on the total amount, 1) not less than 0.01 vol % and less than 1.0 vol % of a phosphate, 2) from 0.01 to 1.0 vol % of at least one of an alkylphosphorothionate and an arylphosphorothionate and 3) from 0.01 to 1.0 vol % of an epoxy compound.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: April 24, 2001
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Nippon Mitsubishi Oil Corporation
    Inventors: Yasushi Akahori, Noboru Masuda, Takeshi Izawa, Masayoshi Muraki, Kazuo Tagawa, Tomohiro Magome