Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11976030 | Process to recover high quality 3-methyl-but-3-en-1-ol | Andreas Keller, Martin Kamasz, Gabriele Gralla, Bernhard Brunner | 2024-05-07 |
| 11618725 | Process to recover 3-methyl-but-3-en-1-ol | Andreas Keller, Martin Kamasz, Gabriele Gralla, Bernhard Brunner | 2023-04-04 |
| 10919827 | Process for recovering 3-methylbut-3-en-1-ol | Albert Werner, Miriam BRU ROIG, Andrei-Nicolae Parvulescu, Andreas Keller, Stephan Maurer +2 more | 2021-02-16 |
| 6399031 | Continuous flow reactor having a plurality of alternating bends | Christof Herrmann, Wolfgang Hubinger, Jens Kremeskotter, Jurgen Schmidt-Thummes, Hans-Ulrich Moritz +2 more | 2002-06-04 |
| 6229043 | Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content | Dietrich Scherzer, Bernd Bruchmann, Peter Keller, Willy van Pee, Wolfgang Heider +4 more | 2001-05-08 |
| 5654479 | 4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Bernd Bruchmann, Helmut Tesch, Johann Swoboda +3 more | 1997-08-05 |
| 5637664 | Polymeric, catalytically active compounds, their preparation, and their use as catalysts in the preparation of polyisocyanates containing uretdione groups | Bernd Bruchmann, Christian Schade, Konrad Stiefenhoefer | 1997-06-10 |
| 5633329 | Preparation of high molecular weight polymers | Hans-Joachim H ahnle, Eckhard Neufeld, Gunnar Schornick, Thomas Anstock, J urgen Tropsch +1 more | 1997-05-27 |
| 5621138 | 4-substituted bis (2,6-diisopropylphenyl)- carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Bernd Bruchmann, Helmut Tesch, Johann Swoboda +3 more | 1997-04-15 |
| 5616784 | Thermal cleavage of carbamic esters | Hans Volkmar Schwarz, Andreas Otterbach, Otto Mattner, Franz Merger, Wolfgang Schwarz +2 more | 1997-04-01 |
| 5597885 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures | Heinz-Dieter Lutter, Bernd Bruchmann, Claudia Spang, Dietrich Scherzer, Michael Lugmayr +1 more | 1997-01-28 |
| 5597942 | Carbodiimides and/or oligomeric polycarbodiimides based on 1 3-bis (1-methyl-1-isocyanatoethyl) benzene their use as hydrolysis stabilizers | Siegmund Pohl, Friedhelm Lehrich, Manfred Genz, Bernd Bruchmann, Helmut Tesch +1 more | 1997-01-28 |
| 5596063 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures of this type | Heinz-Dieter Lutter, Bernd Bruchmann, Claudia Spang, Dietrich Scherzer, Michael Lugmayr +1 more | 1997-01-21 |
| 5565527 | Polymeric, catalytically active compounds, their preparation, and their use as catalysts in the preparation of polyisocyanates containing uretdione groups | Bernd Bruchmann, Christian Schade, Konrad Stiefenhoefer | 1996-10-15 |
| 5532414 | 4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Bernd Bruchmann, Helmut Tesch, Johann Swoboda +3 more | 1996-07-02 |
| 5504241 | Carbodiimides and/or oligomeric polycarbodiimides based on 1,3-bis(1-methyl-1-isocyanatoethyl)benzene, their preparation, and their use as hydrolysis stabilizers | Siegmund Pohl, Friedhelm Lehrich, Manfred Genz, Bernd Bruchmann, Helmut Tesch +1 more | 1996-04-02 |
| 5498747 | Carbodiimides and/or oligomeric polycarbodiimides based on 1,3-bis (1-methyl-1-isocyanatoethyl)benzene, their preparation, and their use as hydrolysis stabilizers | Siegmund Pohl, Friedhelm Lehrich, Manfred Genz, Bernd Bruchmann, Helmut Tesch +1 more | 1996-03-12 |
| 5494941 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures of the type | Heinz-Dieter Lutter, Bernd Bruchmann, Claudia Spang, Dietrich Scherzer, Michael Lugmayr +1 more | 1996-02-27 |
| 5484916 | Process for the preparation of isocyanates containing uretdione groups by using imidazole group containing polymeric catalysts | Bernd Bruchmann, Christian Schade | 1996-01-16 |
| 5449775 | Imidazole group containing polymeric catalysts their preparation, and their use in the preparation of isocyanates containing uretdione groups | Bernd Bruchmann, Christian Schade, Konrad Stiefenhoefer | 1995-09-12 |
| 5246993 | Oligomeric carbodiimides | Deitrich Scherzer, Friedhelm Lehrich, Werner Langer | 1993-09-21 |
| 5208368 | Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates of reduced iodine color number | Dietrich Scherzer, Bernd Bruchmann, Wolfgang Heider, Willy van Pee, Peter Keller | 1993-05-04 |
| 5207942 | Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number | Dietrich Scherzer, Werner Langer, Bernd Bruchmann, Wolfgang Heider, Peter Keller +2 more | 1993-05-04 |
| 5173518 | Preparation of cellular polyurethane elastomers using polyether carbonate diols as a starting component | Kaspar Bott, Horst King, Claudia Spang, Wolfgang Straehle | 1992-12-22 |
| 5153140 | Process for controlling and optimising industrial processes for the preparation of dyes, fluorescent whitening agents and their intermediates | Horst Langfeld, Claudio Puebla, Wilhelm Schmidt | 1992-10-06 |