Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4665163 | Diaryl pigments with improved heat stability obtained by coupling bis-diazotized diamines with acetoacetanilides | Klaus Hunger, Heinrich Frolich | 1987-05-12 |
| 4235641 | Dyeing agent compositions based on polypropylene wax | Manfred Engelmann, Karl-Heinz Maier, Arno Spange, Bernd Dewald, Wolfgang Teige | 1980-11-25 |