Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |