ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,642, issued on June 23, was assigned to IDEMITSU KOSAN Co. LTD. (Tokyo).
"Lubricant base oil" was invented by Kazushige Matsubara (Tokyo) and Hiroyuki Tatsumi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lubricant base oil having a natural origin content (ISO 16128) of 100%, may contain a monoester compound having one or more branched structures and 18 or more carbon atoms. The monoester compound may a compound of formula (1):wherein R1 and R2 are each independently a hydrocarbon group, at least one of R1 and R2 is a branched hydrocarbon group, and a total number of carbon atoms of R1 and R2 is 17 or more. In the compound of formula (1), ...