Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6413309 | Pigment preparations comprising two or more perylene compounds | Manfred Urban, Manfred Opravil, Erwin Dietz | 2002-07-02 |
| 6409816 | Pigment preparations based on diketopyrrolopyrrole pigments with basic perylene dispersants | Erwin Dietz | 2002-06-25 |