Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5670694 | Process for the preparation of 2,4-dichloro-5-fluorobenzonitrile and 2,6-dichloro-3-fluorobenzonitrile | Helmut Fiege, Reinhard Lantzsch | 1997-09-23 |
| 5659088 | Process for the preparation of 4-fluorothiophenol | Helmut Fiege, Wolfgang Eymann, Otto Neuner, Herbert Muller | 1997-08-19 |
| 5650542 | Process for the preparation of 2-chloro-6-nitrophenyl alkyl sulphides and novel 2-chloro-6-nitrophenyl alkyl sulphides | Helmut Fiege | 1997-07-22 |
| 5591869 | Process for the preparation of methylene compounds and the novel compound 2-(2,4-Dichloro-5-fluorobenzyl)thiophene | Helmut Fiege | 1997-01-07 |