ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,607, issued on Sept. 30, was assigned to IDEMITSU KOSAN Co. LTD. (Chiyoda-ku, Japan).
"Lubricant composition" was invented by Yuji Komuro (Ichihara, Japan), Kiyohiko Yokota (Ichihara, Japan) and Kiyokazu Katayama (Ichihara, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lubricating oil composition containing a poly-Alpha-olefin and an antioxidant, in which an evaporation loss by the Noack method is 4.9% by mass or less, a kinematic viscosity at 100deg C. is 6.5 mm2/sec or less, and an amount of the antioxidant with respect to the poly-Alpha-olefin is 0.05% by mass or more."
The patent was filed on April 19, 2022, under Application No. 18/5...