ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,517, issued on June 30, was assigned to DORF KETAL BRASIL LTDA, BRAZIL (Nova Santa Rita, Brazil).

"Functionalized phosphonates, and water-soluble salts and N-oxide derivatives thereof, and method of use thereof as scale inhibitor" was invented by Chun Te Huang (Nova Santa Rita, Brazil), Rubens Bisatto (Nova Santa Rita, Brazil), Fernanda Fiegenbaum (Nova Santa Rita, Brazil) and Carlos Rodolfo Wolf (Nova Santa Rita, Brazil).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a composition comprising functionalized phosphonate, and water-soluble salt and N-oxide derivatives thereof, and method of use thereof as scale inhibito...