Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872883 | Mixtures of monoazo dyestuffs | Klaus Hofmann, Manfred Hahnke | 1989-10-10 |
| 4851012 | Mixtures of blue disperse monoazo dyestuffs | Hubert Kruse, Reinhard Kuhn, Margareta Boos | 1989-07-25 |
| 4812143 | Liquid formulations of disperse dyestuffs containing inorganic oxides or silicates for dyeing textile materials | Klaus Hofmann, Erwin Dietz | 1989-03-14 |
| 4795807 | Preparation of azo dyestuffs by diazotization and coupling in the presence of an ester | Friedrich Schophoff, Wolf Weidemuller | 1989-01-03 |