ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,545,858, issued on Feb. 10, was assigned to CHEMISCHE FABRIK DR. WEIGERT GMBH & Co. KG (Hamburg, Germany).

"Liquid cleaning agent concentrate, ready-to-use solution, uses thereof and cleaning method" was invented by Dennis Eisert (Bornsen, Germany), Bastian Wulff (Hamburg, Germany) and Matthias Springer (Hamburg, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Liquid cleaning agent concentrate comprising: a. at least one phosphonate, b. a first complexing agent selected from aminopolycarboxylic acids, hydroxycarboxylic acids, hydroxypolycarboxylic acids and their salts, and c. at least one enzyme, preferably proteolytic enzyme, a pH of the liquid...