Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6054553 | Process for the preparation of polymers having recurring agents | Torsten Groth, Winfried Joentgen, Frank Dobert, Klaus-Peter Heise, Thomas Menzel +3 more | 2000-04-25 |
| 5962365 | Process for the manufacture of aromatic amines by gas-phase hydrogenation and catalyst useful thereof | Reinhard Langer, Hans-Josef Buysch | 1999-10-05 |
| 5925791 | Process for producing 4-aminodiphenylamine | Hans-Josef Buysch, Christian Laue, Heinrich Konigshofen, Ulrich Notheis, Pieter Ooms | 1999-07-20 |
| 5877350 | Process for the production of aromatic amines | Reinhard Langer, Hans-Josef Buysch, Paul Wagner | 1999-03-02 |
| 5808157 | Process for producing aromatic amines | Reinhard Langer, Hans-Josef Buysch, Paul Wagner | 1998-09-15 |
| 5679858 | Process for the manufacture of aromatic amines by gas-phase hydrogenation and catalyst useful thereof | Reinhard Langer, Hans-Josef Buysch | 1997-10-21 |
| 5593936 | Hydrated niobium oxide and hydrated tantalum oxide catalysts, their preparation and a process for preparing N-alkylated anilines using these catalysts | Volker Glock, Bernd Pennemann, Joerg-Dietrich Jentsch, Eberhard Zirngiebl, Horst Koller | 1997-01-14 |
| 5386067 | Process for separating mixtures of m- and p-dichlorobenzene | Hans-Josef Buysch, Lothar Puppe, Kai Rohlk, Rolf Grosser, Hans-Ingolf Paul | 1995-01-31 |