Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5718731 | Oxidation hair dye composition based on 4,5-diaminopyrazole and m-phenylenediamine derivatives | Isolde Loewe, Wolfgang Balzer, Stefan Gerstung | 1998-02-17 |
| 5645610 | Substituted 2-alkylamino-4-amino-1-alkylbenzene compounds and oxidation hair dye compositions based on said compounds | Wolfgang Balzer, Anke Frank | 1997-07-08 |
| 5542953 | 5-halogen-2,4-Bis (alkylamino)-1-alkylbenzenes and hair dye compositions containing same | Wolfgang Balzer, Thomas Clausen, Anke Frank | 1996-08-06 |
| 5382702 | Process for the production of 5-alkoxy-2,4-dinitro-alkylbenzenes | Wolfgang Balzer, Thomas Clausen | 1995-01-17 |
| 5224965 | Composition for the oxidative dyeing of hair and new 5-halogen-2,4-diamino alkylbenzenes | Thomas Clausen, Wolfgang Balzer | 1993-07-06 |