Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874847 | Process for the diazotisation of primary aromatic amines which are sparingly soluble in water | Ernst Burgi, Vladimir Arnold, Ferenc Rakoczi | 1989-10-17 |
| 4855410 | Process for the preparation of fibre-reactive azo compounds containing a phenylenediamine diazo component | Charles Wilhelm | 1989-08-08 |