Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4325870 | Process for the preparation of 2,6-diaminopyridine-azo dyestuffs and of their precursors | Ulrich Buhler | 1982-04-20 |
| 4313872 | Azo coupling in two-phase water-alcohol mixtures | Joachim Ribka | 1982-02-02 |
| 4247456 | Water-insoluble monoazo pyridone dye | Hanswilli von Brachel, Otto Grawinger, Karl Hintermeier, Horst Kindler | 1981-01-27 |
| 4225716 | Process for the manufacture of 2,6-dichloropyridine derivatives | Ulrich Buhler | 1980-09-30 |