ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,747,194, issued on Sept. 29, was assigned to The Regents of the University of Michigan (Ann Arbor, Mich.).

"Freeze concentration for urine-based fertilizer production" was invented by Abraham Noe-Hays (Putney, Vt.) and Nancy Love (Ann Arbor, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for generating a concentrated product from a feedstock includes a feedstock chamber to which the feedstock is provided, a heat exchanger assembly in thermal communication with the feedstock chamber, the heat exchanger assembly being configured to freeze the feedstock in the feedstock chamber, an output flow arrangement configured to carry liquid from the...