US Patent Issued to Chevron U.S.A. on Nov. 25 for "Polyanionic surfactants and methods of making and using thereof" (California Inventors)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,036, issued on Nov. 25, 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 such as in oil and gas operations. Methods of making polyanionic surfactants are also described."

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