Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5244649 | Production of hematite pigments in the form of platelets | Werner Ostertag, Christoph Schwidetzky | 1993-09-14 |
| 5026429 | Metal oxide coated platelet-like organic pigments | Werner Ostertag, Gustav Bock | 1991-06-25 |
| 4978394 | Metal oxide coated aluminum pigments | Werner Ostertag | 1990-12-18 |
| 4948631 | Preparation of particularly bluish pearl luster pigments | Werner Ostertag, Ulrich Graessle | 1990-08-14 |
| 4867795 | Plateletlike pigments based on iron oxide | Werner Ostertag | 1989-09-19 |