Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684217 | Process for preparing 3-fluoro-4,6-dichlorotoluene | Werner Bussmann, Helmut Fiege | 1997-11-04 |
| 5679826 | Process for the preparation of 2-chloroacrylonitrile | Thomas Essert, Helmut Fiege, Friedrich Durholz, Guido Steffan | 1997-10-21 |
| 5391767 | Process for the preparation of alkylene carbonates | Hans-Josef Buysch, Christine Mendoza-Frohn, Alexander Klausener | 1995-02-21 |
| 5359118 | Process for the continuous preparation of dialkyl carbonates | Paul Wagner, Hans-Josef Buysch, Reinhard Langer, Alexander Klausener | 1994-10-25 |
| 5350862 | Process for the preparation of ethylene glycol carbonate | Paul Wagner, Hans-Josef Buysch, Alexander Klausener, Christine Mendoza-Frohn | 1994-09-27 |
| 5231212 | Process for the continuous preparation of dialkyl carbonates | Hans-Josef Buysch, Alexander Klausener, Reinhard Langer | 1993-07-27 |
| 5210343 | Process for the preparation of p-dichlorobenzene | Helmut Fiege | 1993-05-11 |
| 5157170 | Process for reacting polyhalogenated aromatic compounds with monohalogenated or nonhalogenated aromatic compounds | Helmut Fiege | 1992-10-20 |
| 5105036 | Process for ring-chlorination of aromatic hydrocarbons | Helmut Fiege | 1992-04-14 |
| 5095157 | Process for the preparation of 2-chloro-4-nitro-alkylbenzene | Helmut Fiege | 1992-03-10 |
| 4990707 | Process for the ring chlorination of aromatic hydrocarbons | Helmut Fiege | 1991-02-05 |
| 4956505 | Process for the preparation of 4,4-dimethyl-1-(p-chlorophenyl)pentan-3-one | Helmut Fiege, Karl-Wilhelm Henneke | 1990-09-11 |
| 4948886 | Process for the preparation of benzothiazepinone derivatives | Helmut Fiege | 1990-08-14 |
| 4925994 | Process for the ring chlorination of aromatic hydrocarbons | Helmut Fiege | 1990-05-15 |
| 4851596 | Process for nucleus-chlorination of aromatic hydrocarbons | Helmut Fiege, Kai Rohlk, Karlfried Wedemeyer | 1989-07-25 |
| 4827058 | Process for the removal of m-chlorotoluene from chlorotoluene mixtures | Helmut Fiege | 1989-05-02 |