ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,466, issued on Sept. 23, was assigned to UCHICAGO ARGONNE LLC (Chicago).

"Process for conversion of waste to fuel" was invented by Pingping Sun (Downers Grove, Ill.), Theodore R. Krause (Naperville, Ill.), Amgad A. Elgowainy (Lisle, Ill.), Yupo Lin (Naperville, Ill.), Hong Liu (Argonne, Ill.) and Hernan Eugenio Delgado de la Garza (Downers Grove, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for conversion of food waste to biofuel can include a first fermentation in which food waste is converted C2-C4 short-chain carboxylic acids, and a second fermentation in which the C2-C4 short-chain carboxylic acid are elongated into C5-C8 medium...