US Patent Issued to L'Oreal on May 26 for "Process for colouring hair keratin fibers, comprising the application of a composition comprising at least one (poly)carbodiimide compound and a composition comprising at least one associative polymer and a particular compound" (French Inventors)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,636,246, issued on May 26, was assigned to L'Oreal (Paris).

"Process for colouring hair keratin fibers, comprising the application of a composition comprising at least one (poly)carbodiimide compound and a composition comprising at least one associative polymer and a particular compound" was invented by Lindsay Menzer (St. Ouen, France), Chrystel Pourille (St. Ouen, France) and Thin Hinane Hammiche (St. Ouen, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for colouring hair keratin fibers, in particular the hair, comprising the application of a composition A and a composition B to said hair keratin fibers...