Company News, Patents

Hair Dye Patent

Author Image

By: TOM BRANNA

Editor

l Patent No. US 6,635,241 B1: Henkel Kga, Düsseldorf, Germany, patented a method to dye hair by applying an effective amount of aminophenol derivatives and oxidizing them on the hair....

Continue reading this story and get 24/7 access to Happi for FREE


Already a subscriber? Sign in

Keep Up With Our Content. Subscribe To Happi Newsletters