ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,497, issued on Aug. 5, was assigned to ExxonMobil Chemicals Patents Inc. (Baytown, Texas).
"Polypropylene viscosity modifiers and lubricating oils thereof" was invented by Jingwen Zhang (Houston), John R. Hagadorn (Houston), Jo Ann M Canich (Houston) and Peijun Jiang (Katy, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "In some embodiments, a lubricating oil includes at least 50 wt % of a base oil, based on total weight of the lubricating oil. The lubricating oil includes at least 0.1 wt % of a polypropylene homopolymer having a racemic dyad content of about 60% to about 99% and a number average molecular weight (by GPC DRI) of about 10,000 g/m...