Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7749283 | Colorant with nacreous luster for keratin fibers | Helga Kreher, Dirk Lauscher | 2010-07-06 |
| 5961667 | Dyeing hair with compositions which contain oxidation dye precursor compounds, alkaline earth metal peroxides and inorganic or organic acids | Dirk Lauscher | 1999-10-05 |
| 5865855 | Bis-pyrazole aza compounds, processes for making them, and hair dye compositions containing these compounds | Wolfram Geibel, Otto Goettel | 1999-02-02 |