Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7125427 | Coloring agent for keratin fibers | Juergen Schmenger, Wilhelm Abels, Manfred Schmitt, Gabriele Hess | 2006-10-24 |
| 5645610 | Substituted 2-alkylamino-4-amino-1-alkylbenzene compounds and oxidation hair dye compositions based on said compounds | Wolfgang Balzer, Alexa Weinges | 1997-07-08 |
| 5542953 | 5-halogen-2,4-Bis (alkylamino)-1-alkylbenzenes and hair dye compositions containing same | Wolfgang Balzer, Thomas Clausen, Alexa Weinges | 1996-08-06 |