Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7147757 | Method for separating an azepine derivative out of a mixture containing an amine an azepine derivative | Hermann Luyken | 2006-12-12 |
| 7091153 | Hydrogenation catalyst | Guido Voit, Rolf Fischer, Peter Bassler, Andreas Ansmann, Hermann Luyken +2 more | 2006-08-15 |
| 6972075 | Method for removing 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine | Hermann Luyken, Rolf Fischer, Johann-Peter Melder, Peter Bassler, Andreas Ansmann +1 more | 2005-12-06 |
| 6905997 | Method for generating catalysts | Hermann Luyken, Andreas Ansmann, Rolf Fischer, Johann-Peter Melder, Peter Bassler | 2005-06-14 |
| 6896772 | Method for separating ammonia from solutions containing caprolactam and ammonia | Hermann Luyken, Stefan Maixner, Rolf Fischer, Johann-Peter Melder, Peter Bassler +1 more | 2005-05-24 |
| 6878798 | Method for producing a polymer, using caprolactam | Helmut Winterling, Andreas Ansmann, Rolf Fischer, Johann-Peter Melder, Stefan Maixner +2 more | 2005-04-12 |
| 6852669 | Hydrogenation catalyst | Guido Voit, Rolf Fischer, Peter Bassler, Andreas Ansmann, Hermann Luyken +2 more | 2005-02-08 |
| 6828457 | Method for reducing the content of an unsaturated amine in a mixture containing an amine and a nitrile | Christoph Benisch, Hermann Luyken, Andreas Ansmann, Rolf Fischer, Johann-Peter Melder +2 more | 2004-12-07 |
| 6815388 | Method for activating passivated iron | Rolf Fischer, Hermann Luyken, Johann-Peter Melder, Martin Merger, Andreas Ansmann +1 more | 2004-11-09 |
| 6790995 | Preparation of primary and secondary amines from nitriles | Joachim Pfeffinger, Michael Hullmann, Arthur Hohn, Frank Funke, Till Gerlach | 2004-09-14 |
| 6699960 | Method for producing polyamides from dinitriles and diamines | Hermann Luyken | 2004-03-02 |
| 6686465 | Preparation of cyclic lactams | Andreas Ansmann, Peter Bassler, Rolf Fischer, Hermann Luyken, Stefan Maixner +1 more | 2004-02-03 |
| 6683178 | Preparation of cyclic lactams | Andreas Ansmann, Peter Bassler, Rolf Fischer, Hermann Luyken, Stefan Maixner +1 more | 2004-01-27 |
| 6683179 | Preparation of caprolactam | Peter Bassler, Dieter Baumann, Rolf Fischer, Eberhard Fuchs, Johann-Peter Melder | 2004-01-27 |
| 6683180 | Method for the production of caprolactam | Andreas Ansmann, Rolf Fischer, Johann-Peter Melder | 2004-01-27 |
| 6677486 | Hydrogenation of nitriles over Raney catalysts | Andreas Ansmann, Christoph Benisch, Frank Funke, Martin Merger | 2004-01-13 |
| 6677449 | Preparation of caprolactam | Peter Bassler, Dieter Baumann, Rolf Fischer, Eberhard Fuchs, Johann-Peter Melder | 2004-01-13 |
| 6559318 | Method for producing (2S,4R,9S)-octahydro-1H-indole-2-carboxylic acid and intermediate products therefor | Klaus Ebel, Christoph Nubling | 2003-05-06 |
| 6525223 | Preparation of secondary amines from nitriles | Joachim Pfeffinger, Michael Hullmann, Arthur Hohn, Frank Funke, Till Gerlach | 2003-02-25 |
| 6469211 | Hydrogenation of nitriles over Raney catalysts | Andreas Ansmann, Christoph Benisch, Frank Funke, Martin Merger | 2002-10-22 |
| 6462220 | Method for simultaneous preparation of 6-aminocapronitrile and hexamethylene diamine | Hermann Luyken, Andreas Ansmann, Peter Bassler, Rolf Fischer, Johann-Peter Melder +4 more | 2002-10-08 |
| 6359178 | Method for producing hexamethylene diamine | Rolf Fischer, Peter Bassler, Hermann Luyken, Johann-Peter Melder, Martin Merger +3 more | 2002-03-19 |
| 6348601 | Preparation of N-methyl-2-pyrrolidone (NMP) | Johann-Peter Melder, Karl-Heinz Ross, Martin Rudloff, Jörg Liebe | 2002-02-19 |
| 6346641 | Method for simultaneous production of 6-aminocapronitrile and hexamethylenediamine | Hermann Luyken, Andreas Ansmann, Peter Bassler, Rolf Fischer, Johann-Peter Melder +4 more | 2002-02-12 |
| 6297394 | Iron-based catalyst for hydrogenating alpha-, omega-dinitriles | Guido Voit, Rolf Fischer, Peter Bassler, Andreas Ansmann, Hermann Luyken +2 more | 2001-10-02 |