Company News, Patents

Wella Patents Dye Derivatives

Author Image

By: TOM BRANNA

Editor

Patent No. US 7,132,001 B2: Wella, AG, Darmstadt, Germany patented an agent for coloring keratin fibers based on a developer-coupler combination, with the coupler containing at least one 3-aminophenol derivative....

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