Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7271299 | Two-stage method for producing butanediol with intermediated separation of succinic anhydride | Michael Hesse, Stephan Schlitter, Holger Borchert, Markus Schubert, Markus Rösch +4 more | 2007-09-18 |
| 7217679 | Catalytic coating for the hydrogenation of maleic anhydride and related compounds to give γ-butyrolactone, tetrahydrofuran and derivatives thereof | Holger Borchert, Stephan Schlitter, Rolf Fischer, Markus Rösch, Frank Stein +1 more | 2007-05-15 |
| 7193091 | Method for the simultaneous production of tetrahydrofurans and pyrrolidones | Rolf Fischer, Markus Rösch, Nils Bottke, Gunther Windecker, Michael Hesse +2 more | 2007-03-20 |
| 7169958 | Method for the production of 1,4- butane-diol by combined gas-phase and liquid-phase hydrogenation | Michael Hesse, Stephan Schlitter, Holger Borchert, Markus Schubert, Markus Rösch +4 more | 2007-01-30 |
| 7154011 | Method for the production of 1,4- butanediol | Michael Hesse, Stephan Schlitter, Holger Borchert, Markus Schubert, Markus Rösch +4 more | 2006-12-26 |
| 7094933 | Method for producing tetrahydrofurane copolymers | Martin Haubner, Rolf Pinkos | 2006-08-22 |
| 6958404 | Method for the hydrogenation of maleic anhydride and related compounds in a fluid bed reactor | Holger Borchert, Stephan Schlitter, Michael Hesse, Frank Stein, Rolf Fischer +2 more | 2005-10-25 |
| 6921830 | Method for purifying an organic solvent for the purposes of absorption of maleic acid anhydride | Ralf-Thomas Rahn, Gerd Kaibel | 2005-07-26 |
| 6888011 | Porous catalyst for the hydrogenation of maleic anhydride to tetrahydrofuran | Holger Borchert, Stephan Schlitter, Markus Rösch, Rolf Fischer, Ralf-Thomas Rahn | 2005-05-03 |
| 6846389 | Method for distillative separation of mixtures containing tetrahydrofuran, γ-butyrolactone and/or 1,4-butanediol | Gerd Kaibel, Ralf-Thomas Rahn | 2005-01-25 |
| 6831182 | Method for the hydrogenation of maleic anhydride and related compounds in two serial reaction zones | Holger Borchert, Stephan Schlitter, Rolf Fischer, Markus Rösch, Frank Stein +2 more | 2004-12-14 |
| 6730800 | Method for the production of tetrahydrofuran | Rolf Fischer, Frank Stein, Rolf Pinkos, Michael Hesse, Michael Jolyon Sprague +4 more | 2004-05-04 |
| 6693191 | Method for the production of a particle-containing preparation of tetrahydro-3,5-dimethyl-1,3,5-thiadiazin-2-thione | Heinz Isak, Norbert Sendhoff, Franz Schutz, Jörg Therre, Michael Drogemuller +3 more | 2004-02-17 |
| 6624315 | Method of gas phase catalytic oxidation to give maleic acid anhydride | Peter Zehner, Otto Machhammer, Claus Hechler, Gerhard Olbert, Uwe Stabel | 2003-09-23 |
| 6300467 | Production of polytetrahydrofuran with terminal hydroxyl groups by changing the continuous and dispersed phase | Heinz Auer, Jurgen Ciprian, Lothar Franz, Wolfgang Franzischka, Gabriele Iffland +1 more | 2001-10-09 |
| 6072076 | Continuous preparation of alkyl esters of (meth)acrylic acid | Willi Schmidt, Matthias Geisendorfer, Toni Dockner, Holger Herbst, Gerhard Nestler | 2000-06-06 |
| 6037381 | Preparation of polytetrahydrofuran with terminal hydroxyl groups using ion exchangers | Wulfrich Friedemann Beer, Klaus Beiser, Jurgen Ciprian, Lothar Franz, Wolfgang Franzischka +4 more | 2000-03-14 |
| 5945560 | Continuous preparation of alkyl esters of (meth) acrylic acid | Gabriele Iffland, Albrecht Dams, Heinrich Aichinger, Holger Herbst, Gerhard Nestler +1 more | 1999-08-31 |
| 5883288 | Continuous preparation of alkyl esters of (meth)acrylic acid | Gabriele Iffland, Albrecht Dams, Heinrich Aichinger, Holger Herbst, Gerhard Nestler +4 more | 1999-03-16 |