Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4407762 | Process for the isolation of 1-naphthylamine-4,8-disulphonic acid | Heinz U. Blank, Horst Behre, Hans W. Linden | 1983-10-04 |
| 4393234 | Process for the preparation of 3-hydroxybenzoic acid | Heinz U. Blank, Eike Gabel, Ernst Goldschmitt | 1983-07-12 |
| 4354038 | Process for the preparation of 3-hydroxybenzoic acid | Ruthard Potthast, Horst-Dieter Kramer | 1982-10-12 |
| 4338261 | Process for the preparation of 1-naphthylamine-4,6-disulphonic acid and 1-naphthylamine-2,4,6-trisulphonic acid | Heinz U. Blank, Horst Behre, Hans W. Linden | 1982-07-06 |