Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8030522 | Process for the production of toluene diisocyanate | Joachim Zechlin, Bernd Pennemann, Wenbin JI | 2011-10-04 |
| 7645900 | Process for the preparation of isocyanates | Wolfgang Lorenz, Matthias Boehm, Richard Adamson, Anke Hielscher | 2010-01-12 |
| 7615662 | Process for the preparation of isocyanates in the gas phase | Fritz Pohl, Klaus Biskup, Rainer Bruns, Herbert Stutz | 2009-11-10 |
| 7575660 | Process for the distillative separation of aqueous amine solutions | Rainer Buse, Bill Brady | 2009-08-18 |
| 7555917 | Process for purification of anhydrous hydrogen chloride gas | Bill Brady, Guenther Weymans, Berthold Keggenhoff | 2009-07-07 |
| 7541487 | Process for the preparation of isocyanates in the gas phase | Fritz Pohl, Klaus Biskup, Rainer Bruns, Herbert Stutz | 2009-06-02 |
| 7511176 | Process for the preparation of toluenediamines by catalytic hydrogenation of dinitrotoluenes | Fritz Pohl, Wolfgang Lorenz, Lars Padeken, Bernd Pennemann, Gerhard Wiechers | 2009-03-31 |
| 7322565 | Stirring device and process for carrying out a gas-liquid reaction | Rainer Buse, Berthold Keggenhoff, Jurgen Munnig, Joachim C. Ritter | 2008-01-29 |
| 7118653 | Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column | Bill Brady, Berthold Keggenhoff, Kai Verkerk, Gerhard Ruffert | 2006-10-10 |
| 6719957 | Process for purification of anhydrous hydrogen chloride gas | Bill Brady, Guenther Weymans, Berthold Keggenhoff | 2004-04-13 |
| 4732685 | Method of liquid-liquid extraction using material exchange columns | Hans-Walter Brandt, Johannes-Peter Schafer, Jurgen Schroter | 1988-03-22 |