Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9522374 | Shell-and-tube reactor for preparing maleic anhydride | Gerhard Olbert, Hans-Jürgen Bassler | 2016-12-20 |
| 8933277 | Process for preparing polymethylols | Stephan Schlitter, Stefan Rittinger, Tilman Sirch, Steffen Maas | 2015-01-13 |
| 8884076 | Method for preparing polymethylols | Tilman Sirch, Steffen Maas, Stefan Rittinger, Stephan Schlitter | 2014-11-11 |
| 8853465 | Process for preparing neopentyl glycol | Maria Guixa Guardia, Kai Stehmeier | 2014-10-07 |
| 8575401 | Method for purifying crude polymethylols | Tilman Sirch, Steffen Maas, Stefan Rittinger | 2013-11-05 |
| 8461356 | Process for obtaining maleic anhydride by distillation | Gunther Windecker, Gerd Kaibel, Thilo Buntrock, Jens Weiguny, Dany Vanden Hautte +1 more | 2013-06-11 |
| 7767865 | Method for producing hydroxypivalaldehyde and neopentyl glycol | Tilman Sirch, Steffen Maas, Stefan Rittinger, Stephan Schlitter | 2010-08-03 |
| 7605292 | Method for the separation of polymeric by-products from 1,4-butynediol | Rudolf Erich Lorenz, Rolf Pinkos, Gerd Schaefer, Thomas Danner | 2009-10-20 |
| 7598405 | Method for the distillative processing of tetrahydrofuran | Gunther Windecker, Alexander Weck, Markus Roesch, Rolf Pinkos, Dany Vanden Hautte | 2009-10-06 |
| 7572941 | Method for the separation of polymeric by-products from 1,4-butynediol | Rudolf Erich Lorenz, Rolf Pinkos, Gerd Schaefer | 2009-08-11 |
| 7538254 | Method for the separation of polymeric by-products from 1,4-butynediol | Rudolf Erich Lorenz, Rolf Pinkos, Gerd Schaefer, Thomas Danner | 2009-05-26 |
| 7524996 | Method for the separation of polymeric by-products from 1,4-butynediol | Rudolf Erich Lorenz, Rolf Pinkos, Gerd Schaefer | 2009-04-28 |
| 7462747 | Process for preparing polyalcohols from formaldehyde having a low formic acid content | Timan Sirch, Steffen Maas, Stefan Rittinger, Stephan Schlitter, Maria Guixa +2 more | 2008-12-09 |
| 7388116 | Hydrogenation of methylolalkanals | Steffen Maas, Thorsten Johann, Michael Koch, Tilman Sirch, Stephan Schlitter +2 more | 2008-06-17 |
| 5000832 | Purification of aqueous glyoxal solutions | Hartwig Voss, Leopold Hupfer | 1991-03-19 |
| 4990227 | Preparation of hydroxycarboxylic esters | Heinz Hannebaum | 1991-02-05 |
| 4702803 | Preparation of pyrazoles | Eckhard Stroefer | 1987-10-27 |
| 4661217 | Preparation of carbamic acid esters | Dieter Degner, Heinz Hannebaum | 1987-04-28 |