Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4925926 | Preparation of cationic azo or hydrazone dyes in which the alkylation and the separation of the cationic dye are carried out continuously | Ermanno Ciapponi, Pierre Pessonneaux | 1990-05-15 |
| 4650867 | Process for the preparation of 2,4,6-tris(aminophenylamino)triazines | Willy Stingelin, Ernst Hanggi | 1987-03-17 |