Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5280128 | Process for the preparation of benzothioxanthene dyestuffs | Wolfgang Bauer, Eberhard Grimm, Uwe Nickel, Manfred Schrod | 1994-01-18 |
| 4677209 | Process for the preparation of 2-mercaptobenzoxazoles | Ulrich Kussmaul, Manfred Langer, Kuno Reh, Johannes Becherer, Rolf Muller | 1987-06-30 |
| 4447623 | Process for the preparation of 4,5-dichloro-1,2-dithiacyclopenten-3-one | Rolf Muller | 1984-05-08 |
| 4413144 | 4-Isopropyl-4'-nitrobenzophenone and a process for the preparation of 4'-nitrobenzophenones substituted in the 4-position | Horst Tappe | 1983-11-01 |
| 4320060 | Process for the preparation of derivatives of 3-(4-hydroxy-anilino)carbazole | Steffen Piesch, Friedrich Engelhardt, Wolf Weidemuller, Artur Meyer | 1982-03-16 |
| 4185017 | N-substituted .epsilon.-caprolactams | Steffen Piesch | 1980-01-22 |