Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6465659 | Process for preparing asymmetrical methine dyes | Josef-Walter Stawitz, Christoph Thiebes | 2002-10-15 |
| 6121452 | Process for the preparation of quinophthalones | Dietmar Kalz, Stephan Michaelis | 2000-09-19 |
| 5955614 | Bridged perinones/quinophthalones | Dietmar Kalz, Dieter Arlt | 1999-09-21 |
| 5912386 | Bridged anthraquinones | Dietmar Kalz, Helmut Blaser | 1999-06-15 |
| 5646257 | Azodyestuffs, their preparation and their use | Karin Hassenruck, Peter Wild, Klaus Wunderlich | 1997-07-08 |
| 5639896 | Process for the preparation of N,N'-disubstituted 1,4-diaminoanthraquinones | Dietmar Kalz, Reinold Schmitz, Josef Schroder, Stephan Michaelis | 1997-06-17 |
| 4892950 | Process for the preparation of naphthalene-1,8-dicarboximides | Detlef-Ingo Schutze, Klaus Wunderlich, Martin Wienkenhover | 1990-01-09 |