Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7696360 | Method for the separation of ascorbic acid from a polar solvent containing ascorbic acid and 2-keto-L-gulonic acid | Gerd Kaibel, Martin Merger, Thomas Domschke, Petra Deckert | 2010-04-13 |
| 7241365 | Material for a facility for the production of anhydrous formic acid | Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +2 more | 2007-07-10 |
| 6867329 | Waste water treatment in a method for producing formic acid which is free of water | Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +1 more | 2005-03-15 |
| 6841700 | Method for producing anhydrous formic acid | Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +1 more | 2005-01-11 |
| 6838579 | Utilization of an extracting agent as antifoaming agent in the production of anhydrous formic acid | Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +2 more | 2005-01-04 |
| 6777503 | Method for hydroformylating olefins having between 20 and 400 carbon atoms | Harald Schwahn, Gerhard Borchert, Klaus Diehl, Armin Volker Grenacher | 2004-08-17 |
| 6696603 | Method for cleaning off-gas flows | Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +2 more | 2004-02-24 |
| 6331656 | Hydroformylation process | Heinrich-Josef Blankertz, Armin Volker Grenacher, Harald Schwahn, Willi Schönmann, Michael Roper | 2001-12-18 |
| 5481041 | Isolation of triphenylphosphine | Peter Lechtken, Matthias Fankhaenel, Dieter Hermeling | 1996-01-02 |
| 4961827 | Obtaining very pure maleic anhydride from crude maleic anhydride | Dieter Zimmerling, Johannes E. Schmidt, Rolf Seubert, Karl Fischer | 1990-10-09 |
| 4294666 | Process for the manufacture of 4,4'-diphenyl-methane diisocyanate and a mixture of diphenyl-methane diisocyanate isomers containing a small amount of uretdiones and hydrolyzable chlorine | Hans J. Astheimer, Horst Brandtstaedter, Rainer Ohlinger, Willy van Pee, Jaak Van Steen +2 more | 1981-10-13 |