Issued Patents All Time
Showing 51–69 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7705106 | Initial compounds for producing polyurethanes | Peter Groer, Regina Hendreich, Paul Ch. Kierkus, Thomas Ostrowski, Kai Thiele +2 more | 2010-04-27 |
| 7700809 | Process for preparing polyoxymethylene dimethyl ethers from methanol and formaldehyde | Hans Hasse, Sergej Blagov | 2010-04-20 |
| 7671240 | Method for producing polyoxymethylene dimethyl ethers from methanol and formaldehyde | Hans Hasse, Sergej Blagov | 2010-03-02 |
| 7659430 | Method for separating hydrogen chloride and phosgene | Andreas Woelfert, Carsten Knoesche, Hans-Juergen Pallasch, Martin Sesing, Hans-Martin Polka +1 more | 2010-02-09 |
| 7592479 | Reprocessing of reaction material discharged from phosgenation reactors | Stephan Scholl, Martin Sohn, Andreas Woelfert, Hans-Juergen Pallasch, Jan Peter Bredehoeft | 2009-09-22 |
| 7584629 | Separation of a substance mixture consisting of hydrogen chloride and phosgene | Martin Sohn, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Peter Van Den Abeel +3 more | 2009-09-08 |
| 7524405 | Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent | Martin Sohn, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Peter Van Den Abeel +3 more | 2009-04-28 |
| 7414159 | Separation of liquid mixtures in a film evaporator | Neven Lang, Ute Lichtfers, Ulrich Steinbrenner, Hans Hasse | 2008-08-19 |
| 7408083 | Method for the production of diaminodiarylmethanes | Ulrich Steinbrenner, Martin Sohn, Veronika Quaschning, Helmut Moehwald, Kai Thiele +3 more | 2008-08-05 |
| 7358388 | Method for the purification of isocyanates | Andreas Woelfert, Hans-Juergen Pallasch, Heinrich-Josef Blankertz | 2008-04-15 |
| 7345207 | Production of high-concentration formaldehyde solutions | Neven Lang, Hans Hasse, Thomas Grützner, Michael Ott | 2008-03-18 |
| 7342134 | Method for the distillative recovery of toluylenediamine | Carsten Knoesche, Martin Sohn, Ulrich Penzel, Hans-Juergen Pallasch, Gunter Georgi +4 more | 2008-03-11 |
| 7235697 | Use of H2S-containing offgas streams for preparing sulfur-containing products | Christian Müller, Markus Weber | 2007-06-26 |
| 7179935 | Method for producing isocyanates | Michael Ochse, Volker Krase, Andreas Schmidt, Matthias Kloetzer, Imbridt Murrar +1 more | 2007-02-20 |
| 7112694 | Method for producing isocyanates | Andreas Woelfert, Christian Mueller, Andreas Brodhagen | 2006-09-26 |
| 7084297 | Production of isocyanates in the gaseous phase | Andreas Woelfert, Christian Mueller, Joachim Pfeffinger, Markus Weber, Carsten Knoesche | 2006-08-01 |
| 6833469 | Method for producing isocynates | Andreas Wölfert, Christian Müller | 2004-12-21 |
| 4788293 | Preparation of 1-pyrazolines | Wolfgang Rohr, Gerhard W. Rotermund, Rolf Fischer, Reinhard Neudert | 1988-11-29 |
| 4702803 | Preparation of pyrazoles | Michael Steiniger | 1987-10-27 |