Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835261 | Nonionic azo compounds in which the coupling component is a 3,4-dialkoxy aniline derivative | — | 1989-05-30 |
| 4810783 | Process for the preparation of azo dyestuffs having an aniline-type coupler by aminolysis of the appropriate ether group-containing compounds | — | 1989-03-07 |