ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,498, issued on Aug. 5, was assigned to IDEMITSU KOSAN Co. LTD. (Chiyoda-ku, Japan).
"Grease composition" was invented by Keisuke Inda (Chiyoda-ku, Japan), Go Watanabe (Chiyoda-ku, Japan) and Kouji Takane (Chiyoda-ku, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A grease composition, containing a base oil (A), a urea-based thickener (B), and a polymer compound (C). The particles that make up the urea-based thickener (B) in the grease composition satisfy the following requirement (I): the particles have an arithmetic average particle diameter on an area basis as measured by a laser diffraction/scattering method of 2.0 micro metre or less, and t...