Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8834581 | Disazo dyes, preparation and use | Michael Joerss, Clemens Grund, Bernd Hostasch, Gunter Görlitz | 2014-09-16 |
| 5502174 | Reactive dyestuffs based on a substituted barbituric acid | Stefan Ehrenberg, Hermann Henk | 1996-03-26 |
| 4962040 | 2-hydrazono-4,6-dinitrobenzthiazolones useful to form dyestuffs and as color formers for detecting peroxide | Herbert Hugl, Klaus Wehling | 1990-10-09 |
| 4920208 | Basic azo dyestuffs | — | 1990-04-24 |