Patents

Catalyzed Dye System Patented by Estée Lauder Companies

Beauty giant is awarded US Patent No. 11,369,554 B2.

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By: Christine Esposito

Editor-in-Chief

US Patent No. 11,369,554 B2 (Geoffrey Hawkins, Daniel Thomas Nowlan)’ ELC Management LLC, Melville, NY, has patented a dye system for application to a substrate. The system is comprised of at least one dye precursor; an oxidizing agent; and a catalyst. The dye system has a pH of at least about 10.04....

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