Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8193385 | Method for producing isocyanates | Matthias Kloetzer, Heinrich-Josef Blankertz, Gunter Georgi, Eckhard Stroefer, Volker Krase +1 more | 2012-06-05 |
| 8044166 | Process for preparing pentamethylene 1,5-diisocyanate | Martin Fiene, Eckhard Stroefer, Wolfgang Siegel, Stephan Freyer, Oskar Zelder | 2011-10-25 |
| 7997066 | Method for monitoring the functionality of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine | Gerd Kraemer, Stefan Uhl, Wolf Kiefer | 2011-08-16 |
| 7060861 | Method for hydrating poly-or monomethylol alkanals | Matthias Dernbach, Michael Koch, Hagen Weigl, Steffen Maas | 2006-06-13 |
| 6809224 | Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation | Matthias Dernbach, Detlef Kratz, Achim Stammer | 2004-10-26 |
| 6740726 | Polyisocyanates as coating components for coating means rich in solids | Jochem Henkelmann, Heiko Maas, Armin Stamm, Heinz-Peter Rink, Werner-Alfons Jung +1 more | 2004-05-25 |
| 6692616 | Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation | Matthias Dernbach, Detlef Kratz, Achim Stammer, Harald Rust | 2004-02-17 |
| 6586641 | Method for the decomposition of high boiling by-products produced in the synthesis of polyhydric alcohols | Matthias Dernbach, Detlef Kratz, Achim Stammer | 2003-07-01 |
| 6586642 | Color number improvement in polyhydric alcohols by hydrogenation | Matthias Dernbach, Detlef Kratz, Achim Stammer, Mathias Haake, Michael Koch | 2003-07-01 |
| 6469214 | Process for the preparation of ethanolamines | Johann-Peter Melder | 2002-10-22 |
| 6447870 | Optical storage disk blank and method for manufacturing the disk blank | Herbert Beck | 2002-09-10 |
| 6448457 | Method for hydrogenating carbonyl compounds | Michael Hesse, Detlef Kratz, Marc Walter, Manfred Sauerwald | 2002-09-10 |
| 6417353 | Preparing amines | Frank Funke, Joachim Wulff-Doring, Wolfgang Siegel, Andreas Kramer, Johann-Peter Melder +4 more | 2002-07-09 |
| 6353141 | Functionalized cyclopentene-derived oligomer mixtures, their preparation and their use | Edgar Zeller, Bernhard Geissler, Michael Roper, Guido Voit | 2002-03-05 |
| 6323371 | Process for the preparation of alkanolamines having improved color quality | Gunther Ruider, Karl-Heinz Ross, Johann-Peter Melder, Frank Gutschoven, Philip Buskens | 2001-11-27 |
| 6291715 | Process for the preparation of alkanolamines having improved color quality | Gunther Ruider, Karl-Heinz Ross, Boris Breitscheidel, Heike Maier, Sylvia Huber | 2001-09-18 |
| 6292720 | Trimming process for adapting a simulation system to an automatically controlled reference system | Thomas Meyer | 2001-09-18 |
| 6207865 | Method for the hydrogenation of carbonyl compounds | Boris Breitscheidel, Marc Walter, Detlef Kratz, Manfred Sauerwald | 2001-03-27 |
| 6187971 | Method for producing polyalcohols | Detlef Kratz, Achim Stammer, Guido Voit | 2001-02-13 |
| 6187957 | Preparation of amines | Gerald Meyer, Frank Funke, Detlef Kratz, Marc Walter, Michael Hesse | 2001-02-13 |
| 6046359 | Catalysts for the amination of alkylene oxides, alcohols, aldehydes and ketones | Joachim Wulff-Doring, Johann-Peter Melder, Guido Voit, Gutshoven Frank, Wolfgang Harder | 2000-04-04 |
| 5958825 | Catalysts for the amination of alkylene oxides, alcohols, aldehydes and ketones | Joachim Wulff-Doring, Johann-Peter Melder, Guido Voit, 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, Guido Voit, Gutshoven Frank, Wolfgang Harder | 1999-06-29 |