US Patent Issued to CHEMETALL on March 24 for "Method for applying a conversion coating with an aquous pickling composition comprising an aminophosphonic acid and a polymer" (German Inventors)

ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,229, issued on March 24, was assigned to CHEMETALL GMBH (Frankfurt am Main, Germany).

"Method for applying a conversion coating with an aquous pickling composition comprising an aminophosphonic acid and a polymer" was invented by Anna Verena Mohr (Frankfurt am Main, Germany), Marcell Six (Frankfurt am Main, Germany) and Nawel Souad Khelfallah (Frankfurt am Main, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is an aqueous composition having a pH value at 55deg C. in the range from 5 to 9, containing at least one different amino organophosphonic acid derivatives of formula (I)where residues R independently of each other are ...