ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,899, issued on Aug. 19, was assigned to REG Synthetic Fuels LLC (Ames, Iowa).

"Method for upgrading low-value and waste fats, oils, and greases" was invented by David A. Slade (Ames, Iowa), Ramin Abhari (Bixby, Okla.), Martin Haverly (Ames, Iowa) and Peter Z. Havlik (Tulsa, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present technology provides a method that includes contacting a composition with a caustic solution to produce a caustic-treated composition; combining the caustic-treated composition with silica particles to produce a slurry; and removing the silica particles from the slurry to produce a treated composition; wherein the co...