Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 | Ernst Hoyer, Fritz Meininger | 1982-06-08 |
| 4315865 | Process for the production of sulfuric acid semiester compounds by sulfation in a machine employing kneading action | Ernst Hoyer, Dieter Wagner | 1982-02-16 |