Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968835 | Process for the preparation of aminoaryl-sulphonic acids | Heinz U. Blank, Herbert Emde | 1990-11-06 |
| 4859372 | Process for the sulphonation of aromatic compounds with sulphur trioxide | Horst Behre, Heinz U. Blnak, Wilfried Kohler, Nikolaus Muller | 1989-08-22 |
| 4447368 | Process for the preparation of aminoarylsulphonic acids in sulfolene solvent | Herbert Emde, Heinz U. Blank | 1984-05-08 |
| 4435336 | Process for the preparation of aromatic aminosulphonic acids | Herbert Emde, Heinz U. Blank | 1984-03-06 |
| 4382039 | Process for the preparation of 4-nitrotoluene-2-sulphonic acid | Ernst Goldschmitt, Heinz U. Blank | 1983-05-03 |
| 4350566 | Process for the delignification of lignocellulose materials with dinitroanthraquinones | Heinz U. Blank, Gunther Klag | 1982-09-21 |
| 4276431 | Process for the preparation of alkali metal salts of hydroxybenzoates, which are substantially anhydrous and free from hydroxybenzoic acid | Walter Rapp, Bernhard Vosteen | 1981-06-30 |