Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6727395 | Method for producing hexanediol | Frank Stein, Thomas Krug, Thomas Nöbel | 2004-04-27 |
| 6713630 | Continuous preparation of substituted oxazoles | Kirsten Burkart, Tillmann Faust, Jochem Henkelmann, Alois Kindler, Christian Knoll +1 more | 2004-03-30 |
| 6692616 | Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation | Matthias Dernbach, Detlef Kratz, Achim Stammer, Gerhard Schulz | 2004-02-17 |
| 6380443 | Preparation of 1,3-diols | Detlef Kratz, Roland Krokoszinski, Volker Helf | 2002-04-30 |
| 6316680 | Isolation of .alpha.-ethynyl carbinols by distillation | Ralf-Thomas Rahn, Thomas Ruhl, Jochem Henkelmann, Susanne Stutz | 2001-11-13 |
| 6251229 | Process for the separation of 2-aminomethylcyclopentylamine from a mixture containing hexamethyldiamine and 2-aminomethylcyclopentylamine | Hermann Luyken, Alwin Rehfinger, Peter Bassler, Guido Voit, Rolf Fischer +1 more | 2001-06-26 |
| 6204408 | Method for separating 6-aminocapronitrile from mixtures containing 6-aminocapronitrile and an imine | Peter Bassler, Hermann Luyken, Alwin Rehfinger | 2001-03-20 |
| 6013803 | Sterically hindered 4-amino-piperidine with a low dimer content, its production and use | Manfred Julius, Alfred Krause, Hardo Siegel, Wolfgang Siegel, Tom Witzel | 2000-01-11 |
| 6011157 | Process for purifying sterically hindered 4-amino piperidines | Manfred Julius, Alfred Krause, Hardo Siegel, Wolfgang Siegel, Tom Witzel | 2000-01-04 |
| 6008418 | Process for preparing 1,6 hexanediol with a level of purity over 99% | Karl Baur, Rolf Fischer, Rolf Pinkos, Frank Stein, Boris Breitscheidel | 1999-12-28 |
| 5985100 | Process for separating butanol and dibutyl ether by means of dual-pressure distillation | Maik Aron | 1999-11-16 |
| 5981769 | Process for preparing 1,6- hexanediol and caprolactone | Karl Baur, Rolf Fischer, Rolf Pinkos, Frank Stein, Boris Breitscheidel | 1999-11-09 |
| 5670639 | Preparation of n-vinyllactams | Martin Schmidt-Radde, Marc Heider, Albrecht Dams | 1997-09-23 |
| 5603813 | Purifying distillation of vinyl formate | Thomas Ruhl, Marc Heider, Jochem Henkelmann, Ralf-Thomas Rahn | 1997-02-18 |
| 5414097 | Purification of esters of tetrahydro-pyran-4-carboxylic acid | Rolf Fischer, Norbert Goetz, Thomas Kuekenhoehner, Werner Schnurr | 1995-05-09 |
| 5342488 | Separation of 1,4-butanediol from hydrogenation mixtures | Hans-Juergen Gosch, Rolf Fischer, Claus Hechler, Rolf Pinkos | 1994-08-30 |
| 5002639 | Separation of ortho-, meta- and para-tolunitrile from ternary mixtures of the isomers | Werner Steck, Helmut Lermer, Fritz Naeumann | 1991-03-26 |
| 4967013 | Preparation of hydroxybenzaldehydes | Werner Steck, Helmut Lermer, Gerhard Fritz, Hardo Siegel | 1990-10-30 |
| 4950763 | Preparation of ketones | Charles Schommer, Klaus Ebel, Toni Dockner, Matthias Irgang, Wolfgang Hoelderich | 1990-08-21 |