US Patent Issued to Stahl International on Jan. 13 for "Composition and process for waterproofing leather" (Dutch, Chinese, Italian Inventors)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,883, issued on Jan. 13, was assigned to Stahl International B.V. (Waalwijk, Netherlands).

"Composition and process for waterproofing leather" was invented by Roberta Gamarino (Casale Monferrato, Italy), Guoqiang Qiang (Shanghai), Frederic Francois Bert D'Anvers (Waalwijk, Netherlands) and Peter Danisch (Waalwijk, Netherlands).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a novel composition for waterproofing leather, hides and/or pelts comprising a carboxyl-functional polysiloxane or an epoxide-functional polysiloxane and a polymer dispersion that contains 2 to 35 weight % of carboxylic groups, preferably a polyacryl...