Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6458954 | Process for preparing piperidines | Guido Giffels, Herbert Diehl, Georg Martin, Lutz Frohn | 2002-10-01 |
| 5869735 | Process for the preparation of alkyl aryl ethers containing carboxyl groups | Stefan Antons, Heinz U. Blank, Helmut Fiege, Heinz-Gerd Hartges | 1999-02-09 |
| 4874892 | Process for the preparation of 6-hydroxynaphthalene-1-carboxylic from 1-aminomethylnaphthalene-6-sulphonic acid | Heinz U. Blank | 1989-10-17 |
| 4835243 | Thermotropic aromatic polymers with high elongation at break, processes for their preparation and their use for the production of moulded articles, filaments, fibres and films | Volker Eckhardt, Hans-Rudolf Dicke, Ludwig Bottenbruch, Frank Kleiner, Heinz U. Blank | 1989-05-30 |
| 4806619 | Thermotropic aromatic polyesters having a high deflection temperature under load and excellent mechanical properties, a process for their preparation and their use for the production of moldings, filaments, fibres and films | Volker Eckhardt, Hans-Rudolf Dicke, Dieter Freitag | 1989-02-21 |
| 4795596 | 1-Aminomethylnaphthalene-6-sulphonic acid, its preparation and its use | Heinz U. Blank | 1989-01-03 |
| 4705652 | Tetra-alkali metal salts of chromotropic acid, a process for their isolation and their use | Horst Behre, Heinz U. Blank, Dietmar Mayer | 1987-11-10 |
| 4427601 | Process for preparing 1-amino-2-naphthol-4-sulphonic acid (amidol acid) | Horst Behre, Heinz U. Blank, Otto Lindner | 1984-01-24 |
| 4426333 | Process for the preparation of 1-benzoylamino-8-hydroxynaphthalene-4,6-disulphonic acid (benzoyl-K acid) | Horst Behre, Bruno Kruger, Adolf Winkler | 1984-01-17 |