US Patent Issued to WELLA GERMANY on June 24 for "Method and composition for coloring a keratinous substrate using solubilized vat dyes" (German, Swiss Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,053, issued on June 24, was assigned to WELLA GERMANY GMBH (Darmstadt, Germany).

"Method and composition for coloring a keratinous substrate using solubilized vat dyes" was invented by Sonja Telser (Heidelberg, Germany), Ingo Weber (Basel, Switzerland), Petra Braun (Munster, Germany) and Markus Speckbacher (Mettenheim-Hart, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure relates to methods for coloring keratinous substrates using solubilized vat dyes, as well as compositions and kits suitable for carrying out the methods. The disclosure also relates to novel solubilized vat dyes."

The patent was filed on Aug. 12, 2021, under A...