Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880769 | Transfer of catinic dyes in their deprotonated, electrically neutral form | Johannes P. Dix, Udo Mayer, Ruediger Sens | 1989-11-14 |
| 4865762 | Polymers which form liquid-crystalline phases | Willi Kreuder, Peter Neumann, Hans-Josef Sterzel, Helmut Ringsdorf | 1989-09-12 |
| 4843153 | Azo dyes containing thienothiophene radicals as radicals of the diazo component | Heinz Eilingsfeld, Guenter Hansen, Helmut Reichelt | 1989-06-27 |
| 4837269 | 2-aminothiophene radical substituted by an electron withdrawing group | Guenter Hansen, Ernst Schefczik, Helmut Reichelt | 1989-06-06 |
| 4814465 | Preparation of aminothiophene derivatives | — | 1989-03-21 |