US Patent Issued to ENEOS on March 25 for "Refrigerator oil, and working fluid composition for refrigerator" (Japanese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,532, issued on March 25, was assigned to ENEOS Corp. (Tokyo).

"Refrigerator oil, and working fluid composition for refrigerator" was invented by Hidetoshi Ogata (Tokyo), Fumiyuki Nara (Tokyo) and Yohei Shono (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aspect of the present invention provides a refrigerating machine oil containing: a lubricating base oil; and a polymer containing an unsaturated carboxylic acid ester as a monomer unit, wherein the unsaturated carboxylic acid ester contains an ester of an unsaturated carboxylic acid and an alcohol having a hydrocarbon group represented by the following formula (1):wherein x represents an ...