ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,769, issued on April 21, was assigned to CHEVRON ORONITE COMPANY LLC (San Ramon, Calif.).
"Antioxidants with high mono-alkylated diphenylamine content" was invented by Ryan Oliver (Alamo, Calif.), Andrew Michael Thomas (El Sobrante, Calif.) and Joanne Liu (Richmond, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Lubricating oil composition is provided. The composition includes several components including a major amount of a base oil, a mixture of alkylated diphenylamines having a weight ratio of mono-alkylated diphenylamine to di-alkylated diphenylamine ranging from 0.6 to 4.0, and a molybdenum or sulfur additive that provides synergistic e...