Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672708 | Process for the preparation of N-arylaminoacrylic acid derivatives and the use of N-arylaminoacrylic acid derivatives thus prepared for the preparation of 4-quinolone-3-carboxylic acid derivatives | Gunter Rauchschwalbe, Bernhard Beitzke, Helmut Fiege | 1997-09-30 |
| 5659088 | Process for the preparation of 4-fluorothiophenol | Helmut Fiege, Ferdinand Hagedorn, Otto Neuner, Herbert Muller | 1997-08-19 |