Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663443 | Ruthenium catalysts, their preparation and a process for preparing cycloaliphatic polyamines using these catalysts | Wolfgang Kiel, Eberhard Zirngiebl | 1997-09-02 |
| 5616730 | Process for preparing succinic anhydride | Georg Martin, Eberhard Zirngiebl | 1997-04-01 |
| 5593936 | Hydrated niobium oxide and hydrated tantalum oxide catalysts, their preparation and a process for preparing N-alkylated anilines using these catalysts | Volker Glock, Ursula Pentling, Bernd Pennemann, Eberhard Zirngiebl, Horst Koller | 1997-01-14 |