Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12415780 | Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates | Sven Titlbach, Andreas KUSCHEL, Carlos LIZANDARA, Stephan Schunk, Joerg ROTHER +6 more | 2025-09-16 |
| 11512046 | Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates | Sven Titlbach, Andreas KUSCHEL, Carlos LIZANDARA, Stephan Schunk, Joerg ROTHER +6 more | 2022-11-29 |
| 10435354 | Process for preparing isocyanates in dialkyl carbonates as solvent | Manfred Heilig, Thomas Schulz, Torsten Mattke, Filip Nevejans, Kai Thiele | 2019-10-08 |
| 10093615 | Process for preparing isocyanates in dialkyl carbonates as solvent | Manfred Heilig, Thomas Schulz, Torsten Mattke, Filip Nevejans, Kai Thiele | 2018-10-09 |
| 8829232 | Process for preparing aromatic isocyanates | Ulrich Penzel, Torsten Mattke, Andreas Wölfert, Johannes Jacobs, Tsung-Chieh Cheng +6 more | 2014-09-09 |
| 8772535 | Process for preparing isocyanates | Ralf Boehling, Sven Kueber, Eckhard Stroefer, Jochem Henkelmann, Georg Krug +1 more | 2014-07-08 |
| 8614356 | Method for producing toluylenediamine by hydrogenating dinitrotoluene | Joana Coelho Tsou, Steffen Oehlenschlaeger, Ekkehard Schwab, Wolfgang Mackenroth, Hartwig Voss +3 more | 2013-12-24 |
| 8212069 | Process for preparing isocyanates | Ralf Boehling, Sven Kueber, Eckhard Stroefer, Jochem Henkelmann, Georg Krug +1 more | 2012-07-03 |
| 7875740 | Iron-containing material suitable for use as hydrogenation catalyst | Andreas Ansmann, Christoph Benisch, Peter Baβler, Rolf Fischer, Johann-Peter Melder +1 more | 2011-01-25 |
| 7501047 | Method for purifying caprolactam | Hermann Luyken, Andreas Ansmann, Christoph Benisch, Peter Baβler, Rolf Fischer +1 more | 2009-03-10 |
| 7385073 | Method for reducing the content of an unsaturated amine in a mixture containing an amino nitrile, a diamine, a dinitrile or mixtures thereof | Christoph Benisch, Hermann Luyken, Peter Baβler, Rolf Fischer, Johann-Peter Melder +1 more | 2008-06-10 |
| 7342134 | Method for the distillative recovery of toluylenediamine | Carsten Knoesche, Martin Sohn, Ulrich Penzel, Hans-Juergen Pallasch, Gunter Georgi +4 more | 2008-03-11 |
| 7217818 | Purification of caprolactam | Rolf Fischer, Hermann Luyken, Andreas Ansmann, Peter Bassler, Christoph Benisch +1 more | 2007-05-15 |
| 7115781 | Iron-containing oxidic material suitable for use as hydrogenation catalyst precursor | Andreas Ansmann, Christoph Benisch, Peter Bassler, Rolf Fischer, Johann-Peter Melder +1 more | 2006-10-03 |
| 6896772 | Method for separating ammonia from solutions containing caprolactam and ammonia | Hermann Luyken, Frank Ohlbach, Rolf Fischer, Johann-Peter Melder, Peter Bassler +1 more | 2005-05-24 |
| 6878798 | Method for producing a polymer, using caprolactam | Frank Ohlbach, Helmut Winterling, Andreas Ansmann, Rolf Fischer, Johann-Peter Melder +2 more | 2005-04-12 |
| 6828457 | Method for reducing the content of an unsaturated amine in a mixture containing an amine and a nitrile | Frank Ohlbach, Christoph Benisch, Hermann Luyken, Andreas Ansmann, Rolf Fischer +2 more | 2004-12-07 |
| 6686465 | Preparation of cyclic lactams | Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf Fischer, Hermann Luyken +1 more | 2004-02-03 |
| 6683178 | Preparation of cyclic lactams | Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf Fischer, Hermann Luyken +1 more | 2004-01-27 |