Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4699735 | Process for the preparation of 1,4-diaminoanthraquinone-2-sulfonic acid | Rudolf Schaulin | 1987-10-13 |
| 4661292 | Process for the preparation of 1,4-diamino-2,3-dicyanoanthraquinone | Rudolf Schaulin | 1987-04-28 |
| 4657707 | Process for the preparation of aromatic hydroxy compounds | Rolf Muller | 1987-04-14 |
| 4384119 | Catalytically reductive ring closure for 1-acylamino-3,4-phthaloylacridones | — | 1983-05-17 |
| 4198529 | Process for the production of alkoxy-substituted polycyclic aromatic compounds | Claus D. Weis | 1980-04-15 |