Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4284576 | Preparation of anthraquinone from tetrahydroanthraquinone | Norbert Schenk, Jorg Krekel, Wolfgang Swodenk | 1981-08-18 |
| 4220597 | Process for the preparation of anthraquinone | Kurt Halcourt, Manfred Martin, Norbert Schenk, Wulf Schwerdtel | 1980-09-02 |