ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,473, issued on Sept. 2, was assigned to IDEMITSU KOSAN Co. LTD. (Chiyoda-ku, Japan).
"Lubricant composition" was invented by Ninako Yuasa (Chiyoda-ku, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lubricating oil composition, containing a base oil (A) that satisfies the following requirements (A-1) to (A-4), and a polymer (B) that satisfies the following requirements (B-1) and (B-2): (A-1): a 100deg C. kinematic viscosity is 2.0 mm2/s or more and less than 7.0 mm2/s, (A-2): a viscosity index is 100 or more, (A-3): a content of cycloparaffin is 35.0% by volume or less based on a total volume of the base oil (A), (A-4): an aromatic content (%...