US Patent Issued to Chevron U.S.A. on April 29 for "Polyanionic surfactants and methods of making and using thereof" (California Inventors)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,588, issued on April 29, was assigned to Chevron U.S.A. Inc. (San Ramon, Calif.).

"Polyanionic surfactants and methods of making and using thereof" was invented by Gayani W. Pinnawala (San Ramon, Calif.), Sujeewa S. Palayangoda (San Ramon, Calif.), Gregory A. Winslow (San Ramon, Calif.) and Varadarajan Dwarakanath (San Ramon, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making polyanionic surfactants are also described."

The patent was filed on April 26, 2021, under Applicatio...