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L’Oréal Earns Hair Dye Patent

November 14, 2005

Patent No. US 6,436,151 B2: Research-ers for L’Oréal S.A., Paris, France, patented a cosmetic composition for dyeing hair using at least one oxidation dye, at least one thickening polymer with at least one fatty acid chain and at least one fatty alcohol with more than 20 carbon atoms.
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