Issued Patents 1982
Showing 1–2 of 2 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 |