Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4994089 | Carrier mixture for the dyeing of polyester materials: n-alkylphthalimide and aromatic ester or ether | Frank Bartkowiak, Hans Schulze, Wolf-Dieter Schroer, Gunther Boehmke, Karlhans Jakobs | 1991-02-19 |
| 4891156 | N-alkyl-benzenesulphonamide compositions | — | 1990-01-02 |
| 4609503 | Process for the preparation of 1-amino-8-naphthol-4,6-disulphonic acid (k-acid) | Horst Behre, Heinz U. Blank | 1986-09-02 |
| 4600797 | Process for the preparation of nitroaminobenzenes | — | 1986-07-15 |
| 4426334 | Process for isolating H acid and K acid | Horst Behre, Heinz U. Blank, Otto Lindner | 1984-01-17 |