Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6022999 | Preparation of 3-aminomethyl-3,5,5-trimethylcyclohexylamine having a cis/trans isomer ratio of at least 70:30 | Tom Witzel, Boris Breitscheidel, Hermann Luyken, Karl-Heinz Ross, Peter Wahl | 2000-02-08 |
| 5958825 | Catalysts for the amination of alkylene oxides, alcohols, aldehydes and ketones | Joachim Wulff-Doring, Johann-Peter Melder, Gerhard Schulz, Frank Gutschoven, Wolfgang Harder | 1999-09-28 |
| 5916838 | Catalysts for the amination of alkylene oxides, alcohols, aldehydes and ketones | Joachim Wulff-Doring, Johann-Peter Melder, Gerhard Schulz, Gutshoven Frank, Wolfgang Harder | 1999-06-29 |
| 5917023 | Reductive coupling of nitrobenzene or nitrobenzenes substituted on the nucleus to give the corresponding azobenzenes and azoxybenzenes by means of redox catalysts | Alfred Hagemeyer, Daniel Heineke, Tom Witzel | 1999-06-29 |
| 5917080 | Preparation of 2-cyano-3,3-diarylacrylic esters | Martin Holderbaum, Karl Beck, Alexander Aumuller, Tom Witzel | 1999-06-29 |
| 5904814 | Removal of water and ammonia from benzophenone imine reactor effluents | Matthias Dernbach, Karl Beck, Martin Holderbaum, Hans-Jurgen Weyer | 1999-05-18 |
| 5874607 | Coproduction of 6-aminocapronitrile and hexamethylenediamine | Werner Schnurr, Klemens Flick, Rolf Fischer | 1999-02-23 |
| 5827938 | Preparation of amines and aminonitriles | Werner Schnurr, Klemens Flick, Johann-Peter Melder, Rolf Fischer, Wolfgang Harder | 1998-10-27 |
| 5821380 | 2-cyanoacrylic esters | Martin Holderbaum, Alexander Aumuller, Hubert Trauth, Karin Sperling, Alfred Krause | 1998-10-13 |
| 5789621 | Preparation of amines and aminonitriles | Werner Schnurr, Klemens Flick, Rolf Fischer | 1998-08-04 |
| 5756845 | Preparation of 3-aminomethyl-3,5,5-trimethylcyclohexylamine | Tom Witzel, Boris Breitscheidel, Wolfgang Harder, Hermann Luyken, Axel Paul +2 more | 1998-05-26 |
| 5705699 | Preparation of 3-aminomethyl-3,5,5-trimethylcyclohexylamine | Tom Witzel | 1998-01-06 |
| 5696048 | Cobalt catalysts | Boris Breitscheidel, Peter Polanek, Tom Witzel, Gerd Linden, Michael Hesse | 1997-12-09 |
| 5693793 | Preparation of caprolactam from 6-aminocapronitrile | Josef Ritz, Eberhard Fuchs, Gunther Achhammer, Rolf Fischer | 1997-12-02 |
| 5679855 | Preparation of benzophenone imines | Martin Holderbaum, Tom Witzel, Alexander Aumuller | 1997-10-21 |
| 5536691 | Cobalt catalysts and a process required for their preparation | Boris Breitscheidel, Peter Polanek, Matthias Irgang, Hermann Petersen, Gerd Linden +1 more | 1996-07-16 |
| 5434291 | Preparation of aminopropionitriles | Tom Witzel, Rudolf Kummer, Franz Merger, Martin Brudermueller, Claus-Ulrich Priester +1 more | 1995-07-18 |