Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5364972 | Preparation of nitrobenzophenones, and a color-stable modification of a benzophenone-azopyridone dye | Norbert Zimmerman, Ralf Brueckmann, Gunther Lamm, Arno Lange, Helmut Reichelt | 1994-11-15 |
| 5330543 | Thiopheneazo dyes with a coupling component of the diaminopyridine series | Guenter Hansen, Gunther Lamm, Hermann Loeffler, Helmut Reichelt, Arno Lange +1 more | 1994-07-19 |
| 5318601 | Dye mixtures containing azo and quinophthalone dyes | Arno Lange, Gert Motzkus, Volker Walther | 1994-06-07 |