Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285860 | Trisazo or tetrakisazo dyes containing a heterocyclic group | Guenter Hansen, Hans J. Kolbinger, Georg Zeidler | 1981-08-25 |
| 4272450 | (3-Nitro-4-methyl)-phenyl chloroformate and its preparation | Dieter Schneider | 1981-06-09 |
| 4255333 | Preparation of indolenines | Hans-Joachim Opgenorth, Harald Laas, Axel Nissen | 1981-03-10 |
| 4240963 | Preparation of indolenines | Harald Laas, Axel Nissen, Hans-Joachim Opgenorth, Hans Mueller, Wolfgang Schulte | 1980-12-23 |