Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5230710 | Substituted 2,6-diaminotoluenes, processes for their preparation and coloring agents for keratinic fibers comprising these compounds | Mustafa Akram, Winfried Seidel | 1993-07-27 |
| 5078748 | Substituted 1,3-diaminobenzenes, processes for their preparation and coloring agents, containing these, for keratin fibers | Mustafa Akram | 1992-01-07 |
| 4575378 | Substituted 4-amino-3-nitrophenols, processes for their preparation and hair-coloring agents containing these compounds | Winfried Seidel, Thomas Oelschlager | 1986-03-11 |