US Patent Issued to L'OREAL on March 4 for "Process for dyeing or bleaching keratin fibers using particular amino acids in high concentration" (French Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,239,726, issued on March 4, was assigned to L'OREAL (Paris).

"Process for dyeing or bleaching keratin fibers using particular amino acids in high concentration" was invented by Mickael Agach (Saint-Ouen, France), Henri Samain (Chevilly Larue, France), Simon Donck (Saint-Ouen, France), Ambre Souvirou (Saint-Ouen, France) and Leila Hercouet (Saint-Ouen, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for dyeing or bleaching keratin fibers, comprising the application to the keratin fibers of a composition comprising a high content of one or more particular amino acids followed by the application of a dyeing ...