Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336190 | Copper complex formazan compounds, process for their manufacture and their use as dyestuffs | Gunther Schwaiger | 1982-06-22 |
| 4334076 | Process for the preparation of sulfuric acid semiester ethylsulfonyl compounds of aminophenols, aminobenzanilides or phenylpyrazolones by esterification with sulfuric acid and/or sulfur trioxide in a kneader | Hans H. Steuernagel, Fritz Meininger | 1982-06-08 |
| 4323497 | Water-soluble disazo dyestuffs | Fritz Meininger, Rudolf Fass | 1982-04-06 |
| 4315865 | Process for the production of sulfuric acid semiester compounds by sulfation in a machine employing kneading action | Hans H. Steuernagel, Dieter Wagner | 1982-02-16 |