Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5766576 | Oxidation hair dye compositions containing 3,4,5-triaminopyrazole derivatives and 3,4,5-triaminopyrazole derivatives | Isolde Lowe, Wolfgang Balzer | 1998-06-16 |
| 5718731 | Oxidation hair dye composition based on 4,5-diaminopyrazole and m-phenylenediamine derivatives | Isolde Loewe, Alexa Weinges, Wolfgang Balzer | 1998-02-17 |
| 5663366 | Process for the synthesis of 4,5-diaminopyrazole derivatives useful for dyeing hair | Hans Neunhoeffer, Thomas Clausen, Wolfgang Balzer | 1997-09-02 |
| 5534267 | Composition for the oxidative dyeing of hair containing 4,5-diaminopyrazole derivatives as well as new 4,5-diaminopyrazole derivatives and process for their synthesis | Hans Neunhoeffer, Thomas Clausen, Wolfgang Balzer | 1996-07-09 |
| 5430159 | N-phenylaminopyrazole derivatives as well as composition and process for the dyeing of hair | Hans Neunhoeffer, Thomas Clausen, Wolfgang Balzer | 1995-07-04 |
| 5380340 | Hair dye containing aminopyrazole derivatives as well as pyrazole derivatives | Hans Neunhoeffer, Thomas Clausen, Wolfgang Balzer | 1995-01-10 |