Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5120875 | Process for the preparation of chlorine-substituted aromatic amines | Udo Birkenstock, Herbert Schmidt, Jurgen Zander | 1992-06-09 |
| 4885418 | Process for removing metal halides from liquid organic water-immiscible substances | Sigurd Hartung, by Birgit Hartung-Merse, heir, Uwe Beck, Alfred Mitschker, Andreas Grafe | 1989-12-05 |
| 4350573 | Halogenated aromatic amines which are stable in color, and a process for their preparation | Helmuth Kritzler, Walter Bohm, Hans D. Winkelmann | 1982-09-21 |