Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5594145 | Process for the preparation of 2(3H)-benzothiazolones | Klaus Forstinger, Heinrich Volk | 1997-01-14 |
| 4916257 | Process for the purification of 2-hydroxynaphthalene-6-carboxylic acid | Helmold von Plessen, Siegbert Rittner, Heinrich Volk, Rudolf Neeb | 1990-04-10 |
| 4628106 | Process for the preparation of 2-hydroxy-(9H)-carbazole | Otto E. Schweikert, Walter Reimann, Karl E. Mack | 1986-12-09 |
| 4507491 | Process for preparing 1-nitrobenzene-2-alkyloxycarbonyl-5-carboxylic acids | Wolfgang Tronich | 1985-03-26 |