US Patent Issued to L'OREAL on Jan. 27 for "Composition comprising the combination of two particular oxidation dyeing precursors, an amphoteric or zwitterionic surfactant and a solid fatty substance" (French Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,306, issued on Jan. 27, was assigned to L'OREAL (Paris).

"Composition comprising the combination of two particular oxidation dyeing precursors, an amphoteric or zwitterionic surfactant and a solid fatty substance" was invented by Anne Sabbagh (Saint-Ouen, France) and Valerie Nicou (Saint-Ouen, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a composition comprising at least one oxidation base chosen from 2-methoxymethyl-para-phenylenediamine of formula (I), one of its addition salts, its solvates and/or the solvates of its salts, at least one oxidation coupler chosen from 6-hydroxybenzomorpholine of formula (II), one o...