Issued Patents All Time
Showing 1–25 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5530169 | Process for the preparation of saturated, fluorine-containing and chlorine-free hydrocarbons | Dietmar Bielefeldt, Michael Negele, Heinz Ziemann | 1996-06-25 |
| 5434310 | Process for the preparation of acylbenzenes | Helmut Waldmann, Manfred Hajek, Otto Immel, Lothar Puppe | 1995-07-18 |
| 5334724 | Preparation of substituted 2-chloropyridines | Dieter Kaufmann, Klaus Jelich, Winfried Rosen | 1994-08-02 |
| 5304525 | Catalyst for the preparation of aniline | Otto Immel, Helmut Waldmann, Christian Frohlich, Gerhard Friedhofen, Wilfried Niemeier | 1994-04-19 |
| RE34548 | Process for the selective hydrogenation of unsaturated compounds | Paul Fiedler, Hartmuth Buding | 1994-02-15 |
| 5245082 | Process for the production of di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer | Otto Immel, Gerhard Darsow, Hans-Helmut Schwarz, Helmut Waldmann | 1993-09-14 |
| 5233105 | Process for halogen-fluorine exchange in organic compounds and catalysts for this process | Hans-Helmut Schwarz | 1993-08-03 |
| 5180861 | Process for the preparation of polychloro-fluoro-cyclo-pentenes | Hans-Helmut Schwarz, Albrecht Marhold, Michael Negele | 1993-01-19 |
| 5166440 | Process for the preparation of n-alkylated aromatic amines | Otto Immel, Helmut Waldmann | 1992-11-24 |
| 5145961 | Process for the preparation of 5-fluoropyrimidines | Dietmar Bielefeldt | 1992-09-08 |
| 5102971 | Soluble polyaromatic compounds | Thomas Himmler, Joachim Genz, Karsten-Josef Idel, Ralf Pakull | 1992-04-07 |
| 5097071 | Supported copper catalyst, process for its preparation and process for the preparation of N-alkylated aromatic amines using this copper catalyst | Otto Immel, Hans-Helmut Schwarz | 1992-03-17 |
| 5087747 | Process for the preparation of trifluoromethanesulphenyl chloride | Dietmar Bielefeldt, Albrecht Marhold | 1992-02-11 |
| 5068343 | 4-substituted 5-chloro-2-hydrazinothiazoles | Gunter Beck, Ernst Kysela | 1991-11-26 |
| 5041683 | Nuclear-fluorinated trifluoromethylbenzaldehydes | Albrecht Marhold | 1991-08-20 |
| 4990647 | Process for the preparation of unsymmetric biaryl compounds | Thomas Himmler | 1991-02-05 |
| 4978771 | Process for the selective hydrogenation of unsatuated compounds | Paul Fiedler, Hartmuth Buding | 1990-12-18 |
| 4978769 | Process for introducing fluorine atoms into aromatic rings by nucleophilic exchange | Ernst Kysela | 1990-12-18 |
| 4962246 | Process for the preparation of benzotrifluorides which are substituted by fluorine and optionally in addition by chlorine, and new benzotrifluorides | Albrecht Marhold | 1990-10-09 |
| 4885415 | Process for the preparation of benzotrifluorides which are substituted by fluorine and optionally in addition by chlorine | Albrecht Marhold | 1989-12-05 |
| 4822912 | Process for the preparation of 2,3,5,6-tetrafluorobenzoic acid | Klaus Naumann, Heinz Ziemann | 1989-04-18 |
| 4820735 | Vinylcyclopropanecarboxylic acid esters | Klaus Naumann, Wolfgang Behrenz, Benedikt Becker, Bernhard Homeyer, Wilhelm Stendel | 1989-04-11 |
| 4812587 | Process for selective hydrogenation of C--C double bonds in the presence of reducible, nitrogen-containing groups and new ruthenium complex compounds | Paul Fiedler, Hartmuth Buding | 1989-03-14 |
| 4795788 | Process for the selective hydrogenation of unsaturated polymers containing nitrile groups | Thomas Himmler, Paul Fiedler, Hartmuth Buding | 1989-01-03 |
| 4755621 | Process for the preparation of 2,3,5,6-tetrafluorobenzoic acid, and the new compounds 2,3,5,6-tetrachloro-4-trifluoromethyl-benzoyl chloride and 2,3,5,6-tetrafluoro-4-trifluoromethyl-benzoyl fluoride | Ernst Kysela | 1988-07-05 |