US Patent Issued to CHEMETALL on Nov. 4 for "Phosphate-free cleaner for metallic surfaces with reduced pickling erosion" (German Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,304, issued on Nov. 4, was assigned to CHEMETALL GMBH (Frankfurt, Germany).

"Phosphate-free cleaner for metallic surfaces with reduced pickling erosion" was invented by Andre Schaus (Frankfurt am Main, Germany) and Dominic Weil (Frankfurt am Main, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described herein is a water-based, alkaline cleaner concentrate for producing a cleaner for metallic surfaces, the concentrate including a) at least one (meth)acrylic acid homopolymer having a weight-average molar mass in the range from 3 000 to 19 000 g/mol and b) at least one (meth)acrylic acid copolymer having a weight-average molar mass in the range...