Patents by Inventor Kuniko TAKAHASHI

Kuniko TAKAHASHI 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 working fluid composition for refrigerating machines
    Patent number: 9005470
    Abstract: The refrigerating machine oil of the invention includes an ester of a polyhydric alcohol and a fatty acid, wherein the molar ratio of C4-C6 fatty acid and C7-C9 branched fatty acid in the fatty acid is between 15:85 and 90:10, the C4-C6 fatty acid includes 2-methylpropanoic acid, and the ratio of the total C4-C6 fatty acid and C7-C9 branched fatty acid in the total fatty acids composing the ester is at least 20 mol %. The working fluid composition for a refrigerating machine according to the invention comprises the refrigerating machine oil, a difluoromethane refrigerant and/or an unsaturated fluorinated hydrocarbon refrigerant.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: April 14, 2015
    Assignee: JX Nippon & Energy Corporation
    Inventors: Katsuya Takigawa, Masanori Saito, Takeshi Okido, Kuniko Takahashi
  • Working fluid composition for refrigerator machine and refrigerating machine oil
    Patent number: 8889031
    Abstract: The present invention provides a working fluid composition for a refrigerator machine comprising a base oil comprising an ether-based compound, a carbodiimide compound, and an unsaturated fluorinated hydrocarbon refrigerant. The present invention also provides a refrigerating machine oil comprising a base oil containing an ether-based compound and a carbodiimide compound, the refrigerating machine oil being used together with an unsaturated fluorinated hydrocarbon refrigerant.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: November 18, 2014
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Ken Sawada, Kuniko Takahashi, Hiroko Shimpo, Katsuya Takigawa
  • REFRIGERATING MACHINE OIL AND WORKING FLUID COMPOSITION FOR REFRIGERATING MACHINES
    Publication number: 20130207024
    Abstract: The refrigerating machine oil of the invention includes an ester of a polyhydric alcohol and a fatty acid, wherein the molar ratio of C4-C6 fatty acid and C7-C9 branched fatty acid in the fatty acid is between 15:85 and 90:10, the C4-C6 fatty acid includes 2-methylpropanoic acid, and the ratio of the total C4-C6 fatty acid and C7-C9 branched fatty acid in the total fatty acids composing the ester is at least 20 mol %. The working fluid composition for a refrigerating machine according to the invention comprises the refrigerating machine oil, a difluoromethane refrigerant and/or an unsaturated fluorinated hydrocarbon refrigerant.
    Type: Application
    Filed: August 5, 2011
    Publication date: August 15, 2013
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Katsuya Takigawa, Masanori Saito, Takeshi Okido, Kuniko Takahashi
  • WORKING FLUID COMPOSITION FOR REFRIGERATOR MACHINE AND REFRIGERATING MACHINE OIL
    Publication number: 20120132848
    Abstract: The present invention provides a working fluid composition for a refrigerator machine comprising a base oil comprising an ether-based compound, a carbodiimide compound, and an unsaturated fluorinated hydrocarbon refrigerant. The present invention also provides a refrigerating machine oil comprising a base oil containing an ether-based compound and a carbodiimide compound, the refrigerating machine oil being used together with an unsaturated fluorinated hydrocarbon refrigerant.
    Type: Application
    Filed: November 18, 2011
    Publication date: May 31, 2012
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Ken SAWADA, Kuniko TAKAHASHI, Hiroko SHIMPO, Katsuya TAKIGAWA