US Patent Issued to L'Oreal on Feb. 10 for "Dyeing composition comprising an anthraquinone cationic direct dye, a polyol, an anionic surfactant and a nonionic polysaccharide" (French Inventors)

ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,322, issued on Feb. 10, was assigned to L'Oreal (Paris).

"Dyeing composition comprising an anthraquinone cationic direct dye, a polyol, an anionic surfactant and a nonionic polysaccharide" was invented by Valerie Nicou (Saint-Ouen, France), Samira Rharbi (Saint-Ouen, France) and Julie Blanc (Saint-Ouen, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a composition for dyeing human keratin fibers, preferably the hair, comprising:-one or more anthraquinone cationic direct dyes,-one or more polyols,-one or more anionic surfactants, and-one or more nonionic polysaccharides."

The patent was filed on June 29, 2021, under Ap...