Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4892969 | Process for the preparation of 1-amino-2-naphthol-4-sulfonic acid | — | 1990-01-09 |
| 4845638 | Method of eliminating excess nitrite in diazotisation solutions | Ferenc Rakoczi | 1989-07-04 |
| 4777246 | 1-diazo-2-naphthol-4-sulfonic acid by iron-catalyzed diazotization | — | 1988-10-11 |
| 4689048 | Process for the preparation of formulations of water-soluble organic dyes by two-stage membrane separation of crude dye suspension | Alberto Rabassa, Beat Bruttel | 1987-08-25 |