US Patent Issued to Silvateam on March 18 for "Process for tanning leathers, pre-tanning products and use thereof" (Italian Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,752, issued on March 18, was assigned to Silvateam S.P.A. (San Michele Mondovi, Italy).

"Process for tanning leathers, pre-tanning products and use thereof" was invented by Eric Poles (Vicoforte, Italy), Lorenzo Tribuzio (Vinovo, Italy) and Samuele Giovando (Monforte d'Alba, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process for tanning leathers including a pre-tanning step and a tanning step is provided. In the pre-tanning step leathers are treated with a cationic active agent including a quaternized ester of a fatty acid and triethanolamine, or mixtures thereof and, subsequently, with an anionic active agent including tannins vegetabl...