US Patent Issued to Henkel on Oct. 6 for "Method for dyeing keratinous material, in particular human hair" (German Inventors)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,751,907, issued on Oct. 6, was assigned to Henkel AG & Co. KGaA (Dusseldorf, Germany).

"Method for dyeing keratinous material, in particular human hair" was invented by Carolin Kruppa (Hilden, Germany), Torsten Lechner (Langenfeld, Germany), Marc Nowottny (Monchengladbach, Germany), Carsten Mathiaszyk (Essen, Germany), Andreas Walter (Ratingen, Germany), Juergen Schoepgens (Schwalmtal, Germany), Avni Tairi (Duisburg, Germany) and Phillip Jaiser (Langenfeld, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for dyeing keratinous material, such as human hair, is described. Initially, a first agent is applied to the keratinous material. The fi...