Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5250112 | Spinel black pigments based on copper-chromium-manganese mixed oxides, a process for their preparation and their use | Klaus Wussow, Peter Kuske, Manfred Mansmann, Dieter Rade | 1993-10-05 |
| 5167708 | Process for the preparation of pigments containing Cr.sub.2 O.sub.3 | Volker Wilhelm | 1992-12-01 |
| 4450012 | Flocculation-resistant, mixed phase pigments having a rutile structure, process for their preparation, and their use | Volker Wilhelm, Robert Endres, Heinrich Heine | 1984-05-22 |