Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6312512 | Quinacridone mixed-crystal pigments of the gamma phase | Manfred Urban, Joachim Weber, Dieter Schnaitmann, Margit Haberlick | 2001-11-06 |
| 6251553 | Use of mixed-crystal pigments of the quinacridone series in electrophotographic toners and developers, powder coatings and inkjet inks | Ruediger Baur, Manfred Urban, Hans-Tobias Macholdt, Dieter Schnaitmann | 2001-06-26 |
| 6241814 | Process for preparing quinacridone pigments | Manfred Urban, Dieter Schnaitmann, Joachim Weber | 2001-06-05 |
| 6174361 | Process for preparing N,N'-dimethylperylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form | Manfred Urban, Joachim Weber | 2001-01-16 |
| 5989333 | Mixed crystal pigments of the quinacridone series | Manfred Urban, Dieter Schnaitmann | 1999-11-23 |