Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8791302 | Process for preparing an N,N-dialky-ethanolamine having high color stability | Frank-Friedrich Pape, Johann-Peter Melder, Alfred Krause, Roland Bou Chedid | 2014-07-29 |
| 8293075 | Method for the continuous separation by distillation of mixtures that contain morphonline (MO), monoaminodiglycol (ADG), ammonia and water by means of distillation | Helmut Schmidtke, Oliver Buβmann, Ralph Versch, Udo Rheude, Uwe Leyk +2 more | 2012-10-23 |
| 8246793 | Method for the continuous separation of mixtures comprising morpholine (MO), monoaminodiglycol (ADG), ammonia and water by means of distillation | Helmut Schmidtke, Oliver Buβmann, Ralph Versch, Udo Rheude, Uwe Leyk +2 more | 2012-08-21 |
| 8197646 | Processes for continuous fractional distillation of mixtures comprising morpholine, monoaminodiglycol, ammonia and water | Helmut Schmidtke, Oliver Buβmann, Ralph Versch, Udo Rheude, Uwe Leyk +2 more | 2012-06-12 |
| 7825281 | Method for producing electronic grade 2,2′-aminoethoxyethanol | Helmut Schmidtke | 2010-11-02 |
| 7282614 | Method for the production of propargyl alcohol | Maximilian Vicari, Andreas Kramer, Ronald Drews | 2007-10-16 |
| 7227029 | Method for the continuous production of N-methyl-2-pyrrolidone (NMP) | Peter Stops, Erhard Henkes, Helmut Schmidtke, Rolf Fischer, Manfred Julius +2 more | 2007-06-05 |
| 7183438 | Catalysts and method for the production of amines | Till Gerlach, Frank Funke, Johann-Peter Melder, Stefan Iselborn, Michael Hullmann | 2007-02-27 |
| 7164031 | Method for the production of 2-pyrrolidone | Peter Stops, Erhard Henkes, Helmut Schmidtke, Rolf Fischer, Manfred Julius +2 more | 2007-01-16 |
| 6348601 | Preparation of N-methyl-2-pyrrolidone (NMP) | Frank Ohlbach, Johann-Peter Melder, Karl-Heinz Ross, Jörg Liebe | 2002-02-19 |