Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7943047 | Process for the treatment of wastewater from aldolization processes | Siegmar Maassen, Roland Krokoszinski | 2011-05-17 |
| 6809224 | Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation | Matthias Dernbach, Achim Stammer, Gerhard Schulz | 2004-10-26 |
| 6692616 | Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation | Matthias Dernbach, Achim Stammer, Harald Rust, Gerhard Schulz | 2004-02-17 |
| 6586641 | Method for the decomposition of high boiling by-products produced in the synthesis of polyhydric alcohols | Matthias Dernbach, Achim Stammer, Gerhard Schulz | 2003-07-01 |
| 6586642 | Color number improvement in polyhydric alcohols by hydrogenation | Matthias Dernbach, Achim Stammer, Mathias Haake, Michael Koch, Gerhard Schulz | 2003-07-01 |
| 6497886 | 1,3-bis-(N-lactamyl) propane and the pharmaceutical and cosmetic use thereof | Jorg Breitenbach, Siegfried Lang | 2002-12-24 |
| 6448457 | Method for hydrogenating carbonyl compounds | Michael Hesse, Gerhard Schulz, Marc Walter, Manfred Sauerwald | 2002-09-10 |
| 6380443 | Preparation of 1,3-diols | Harald Rust, Roland Krokoszinski, Volker Helf | 2002-04-30 |
| 6316664 | Process for preparing hydroxy-containing compounds from formic acid esters | Christoph Sigwart | 2001-11-13 |
| 6207865 | Method for the hydrogenation of carbonyl compounds | Boris Breitscheidel, Marc Walter, Gerhard Schulz, Manfred Sauerwald | 2001-03-27 |
| 6201160 | Preparation of alcohols | Martin Brudermuller, Matthias Irgang, Martin Schmidt-Radde, Franz Merger, Tom Witzel +5 more | 2001-03-13 |
| 6187971 | Method for producing polyalcohols | Achim Stammer, Gerhard Schulz, Guido Voit | 2001-02-13 |
| 6187957 | Preparation of amines | Gerald Meyer, Frank Funke, Gerhard Schulz, Marc Walter, Michael Hesse | 2001-02-13 |
| 6093677 | Catalyst for dehydrogenating 1,4-butanediol to .gamma.-butyrolactone | Hans Jochen Mercker, Frank-Friedrich Pape, Joachim Simon, Andreas Henne, Michael Hesse +3 more | 2000-07-25 |
| 6018074 | Process for the preparation of polyalcohols | Achim Stammer, Tom Witzel, Martin Brudermuller | 2000-01-25 |
| 5955620 | Dehydrogenation of 1,4-butanediol to .gamma.-butyrolactone | Hans Jochen Mercker, Frank-Friedrich Pape, Joachim Simon, Andreas Henne, Michael Hesse +3 more | 1999-09-21 |
| 5952533 | Method of producing 1,6-hexane diol from epoxybutadiene | Rolf Fischer, Rolf Pinkos, Martin Schäfer, Arthur Hohn | 1999-09-14 |
| 5952438 | Polymeric polyamines from alternating polyketones | Ferdinand Lippert, Peter Schwab, Dieter Boeckh, Johannes Perner | 1999-09-14 |
| 5847131 | Preparation of N-substituted cyclic amines | Joachim Simon, Roman Dostalek, Heinz Lingk, Rainer Becker, Andreas Henne +3 more | 1998-12-08 |
| 5756839 | Process for preparing D,L-aspartic acid from ammonium salts of the maleic acid | Tom Witzel, Rudolf Bazner, Matthias Kroner, Uwe Pressler | 1998-05-26 |
| 5453365 | Preparation of lactates | Hans-Josef Sterzel, Herbert Vogel, Herbert Exner | 1995-09-26 |