Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646126 | Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form | Joachim Weber, Gerhard Wilker, Manfred Urban, Erwin Dietz | 2003-11-11 |
| 6521756 | Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form | Joachim Weber, Gerhard Wilker, Manfred Urban, Erwin Dietz | 2003-02-18 |
| 5800607 | Process for the preparation of liquid pigment preparations | Dieter Schnaitmann, Manfred Urban | 1998-09-01 |
| 5755872 | Process for preparing quinacridone pigments | Manfred Urban, Dieter Schnaitmann | 1998-05-26 |