Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6835211 | Direct hair dyes and use thereof | Bernd Meinigke, Horst Hoeffkes | 2004-12-28 |
| 6828443 | Dyes and colorants | Detlef Hollenberg, Horst Hoeffkes, Frank Naumann, Leszek J. Wolfram, Joachim-Kurt Foitzik | 2004-12-07 |
| 6814761 | Direct hair colorants | Frank Naumann, Bernd Meinigke, Horst Hoeffkes | 2004-11-09 |
| 6743263 | Method for coloring keratin fibers | Horst Hoeffkes, Doris Oberkobusch, Melanie Hitz | 2004-06-01 |
| 6736862 | Indole/indoline based hybrid dyes and indole/indoline based hybrid dye intermediate products | Frank Naumann, Detlef Hollenberg, Horst Hoeffkes | 2004-05-18 |