US Patent Issued to Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung on May 6 for "Method for the dyeing of leather and dyed leather having a high rubbing fastness" (German Inventors)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,817, issued on May 6, was assigned to Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V. (Munich).

"Method for the dyeing of leather and dyed leather having a high rubbing fastness" was invented by Michael Prokein (Oberhausen, Germany) and Manfred Renner (Essen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for dyeing leather with an organic colorant in a supercritical fluid. The method includes coating a surface of the leather to provide a coated surface of the leather. The method further includes dyeing the coated surface of the leather with the organic colorant in the supercritical fluid."

The patent was filed...