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L’Oréal Patents Direct Hair Dye



Published November 14, 2005
Related Searches: patent award research hair
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Patent No. US 6,436,153 B2: L’Oreal S.A. researchers were awarded a patent for a direct hair dye comprising at least one cationic direct dye and at least one compound chosen from C6-C8 aromatic ethers of C2-C9 polyols.


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