Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698705 | Isoindoline pigments | Frank Alfter, Gustav Kapaun, Siegfried Schiessler | 1997-12-16 |
| 5662739 | Use of fatty acid taurides for the dispersion of polycyclic pigments | Manfred Urban | 1997-09-02 |
| 5591258 | Preparation of linear, unsubstituted quinacridone pigments of the .beta.-phase | Manfred Urban | 1997-01-07 |