Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4342684 | Hydrosoluble pyrazolone trisazo dyestuffs derived from 4,4'-diamino-benzenesulfanilide | Andre Louis Sailer | 1982-08-03 |
| 4310331 | Process for the preparation of the dyestuff direct yellow 11 in the form of concentrated stable solutions, the solutions obtained and their applications | Aime Joseph Arsac | 1982-01-12 |