Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5929216 | Benzothiazolium containing azo dyes useful for dyeing polyacrylonitrile | Josef Koller | 1999-07-27 |
| 5223626 | Preparation of cationic alkylenediamine dye intermediates | Janos Vincze | 1993-06-29 |
| 5163972 | Process for the dyeing of polyacrylonitrile materials with cationic benzo-thiazolium azo dye | Josef Koller | 1992-11-17 |