Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4370269 | Monoazo pigment derived from acetoacetylamino benzimidazolone | Friedrich Weingarten, Klaus Hunger | 1983-01-25 |
| 4287122 | Monoazo compounds from 1-aminobenzene-2-carboxylic acid derivatives and their use as colorants | Klaus Hunger, Konrad Lohe | 1981-09-01 |