Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657015 | Method for the secondary cross-linking of hydrogels with 2-oxotetrahydro-1,3-oxazines | Ulrich Riegel, Matthias Weismantel, Volker Frenz, Thomas Daniel | 2003-12-02 |
| 6565768 | Method for producing water-swellable hydorphilic polymers, said polymers and use thereof | Joachim Dentler, Norbert Herfert, Rudolf Schliwa, Uwe Stuven | 2003-05-20 |
| 6559239 | Method for the secondary cross-linking of hydrogels with N-acyl-2-oxazolidinones | Ulrich Riegel, Matthias Weismantel, Volker Frenz, Thomas Daniel | 2003-05-06 |
| 6503979 | Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones | Rüdiger Funk, Volker Frenz, Ulrich Riegel, Matthias Weismantel, Thomas Daniel | 2003-01-07 |
| 6472478 | Process for crosslinking hydrogels with bis- and poly-2- oxazolidinones | Rüdiger Funk, Volker Frenz, Ulrich Riegel, Matthias Weismantel, Thomas Daniel | 2002-10-29 |
| 6417425 | Absorbent article and process for preparing an absorbent article | Darryl L. Whitmore | 2002-07-09 |
| 6297335 | Crosslinked, hydrophilic, highly swellable hydrogels, production thereof and use thereof | Rüdiger Funk, Norbert Herfert, Mariola Wanior, Patricia Brown, Guy Thomas Woodrum | 2001-10-02 |
| 6150477 | Process for the preparation of hydrophilic hydrogels of high swelling capacity | Manfred Mayer, Uwe Nickel | 2000-11-21 |
| 6107432 | Water-swellable, hydrophilic polymer compositions | Rüdiger Funk, Norbert Herfert, Matthias Weismantel | 2000-08-22 |
| 5945495 | Use of surfactants in the drying of hydrophilic highly swellable hydrogels | Thomas Daniel, Norbert Herfert, Gustav Remmel, Ulrich Riegel, Uwe Stuven | 1999-08-31 |
| 5840321 | Hydrophilic, highly swellable hydrogels | Uwe Stuven, Thomas Daniel, Norbert Herfert | 1998-11-24 |
| 5792880 | Process for the preparation of N-lauroyl-L-glutamic acid di-n-butylamide | Manfred Muller, Michael Wessling | 1998-08-11 |
| 5731365 | Hydrophilic, highly swellable hydrogels | Norbert Herfert, Uwe Stuven, Ulrich Riegel, Rüdiger Funk, Detlev Seip | 1998-03-24 |
| 5726331 | Dimethyl n-lauroyl-l-glutamate | Manfred Muller, Michael Wessling | 1998-03-10 |
| 5684104 | Water-swellable hydrophilic polymers | Rüdiger Funk, Ulrich Riegel, Michael Wessling | 1997-11-04 |
| 5668236 | Hydrophilic highly swellable hydrogels | Ulrich Riegel, Uwe Stuven, Helmut Klotzsche, Gustav Remmel | 1997-09-16 |
| 5594083 | Water-swellable hydrophilic polymers | R udiger Funk, Ulrich Riegel, Michael Wessling | 1997-01-14 |
| 5571764 | Absorbent for water and aqueous solutions | Rainer Greve, Gerlinde Ebert, Ulrich Riegel | 1996-11-05 |
| 5530093 | Polycondensates containing phosphinic and phosphonic acid groups | Willi Steckelberg, Karl-Heinz Keil, Ralf Zerrer | 1996-06-25 |
| 5523471 | Process for the preparation of ether-sulphonates | Klaus Delpy, Ralf Zerrer, Dirk Buhring | 1996-06-04 |
| 5510436 | Water-soluble copolymers useful in drilling fluids | Martin Hille, Heinz Wittkus, Jürgen TONHAUSER, Ulrich Riegel | 1996-04-23 |
| 5502231 | Process for the preparation of cyclic vinylphosphonic esters | Ulrich Riegel, Hans-Jerg Kleiner | 1996-03-26 |
| 5492995 | Polycondensates containing phosphinic or phosphonic acid groups and siloxane groups | Karl-Heinz Keil, Jurgen Kuhlwein, Wilfried Schuler, Willi Steckelberg, Ralf Zerrer +1 more | 1996-02-20 |
| 5488123 | Polycondensates containing polysiloxane groups | Jurgen Kuhlwein, Wilfried Schuler, Ralf Zerrer, Werner Antwerpen | 1996-01-30 |
| 5276247 | Process for obtaining the hydrocarbon from a hydrocarbon-rich gel | Gerlinde Ebert, Werner Zschau | 1994-01-04 |