Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820862 | Process for the preparation of dimethyl terephthalate | Gerhart Hoffmann, Karl Irlweck | 1989-04-11 |
| 4464477 | Process for the recovery and reuse of heavy metal oxidation catalyst from residues in the Witten DMT process | Heinrich Bunger, Gerhard Hoffmann | 1984-08-07 |
| 4372875 | Method for obtaining and reusing of oxidation catalyst in the Witten DMT process | Heinrich Bunger, Gerhart Hoffmann | 1983-02-08 |