Issued Patents All Time
Showing 1–4 of 4 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, Dieter Messer, Dieter Rade | 1993-10-05 |
| 4919723 | Rutile mixed phase pigments with improved coloristic properties | Volker Wilhelm | 1990-04-24 |
| 4271130 | Process for the preparation of zeolite A from kaolin | Robert Endres, Heinz Drave, Lothar Puppe | 1981-06-02 |
| 4188281 | Two-stage production of olefins utilizing a faujasite structure zeolite in hydrogenation stage | Hans J. Wernicke, Allan Watson, Walter Kreuter, Horst Weber | 1980-02-12 |