Issued Patents 2003
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646126 | Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form | Gerhard Wilker, Manfred Urban, Martin Bohmer, Erwin Dietz | 2003-11-11 |
| 6616859 | Preparation of alcoholic solutions of alkali metal alkoxides | Uwe Nickel, Leonhard Unverdorben, Erwin Dietz, Juergen Patzlaff | 2003-09-09 |
| 6582508 | Process for fine division of organic pigments | Erwin Dietz, Dieter Schnaitmann, Christian Wille, Leonhard Unverdorben | 2003-06-24 |
| 6566519 | Preparation of diketopyrrolopyrrole pigments | Uwe Nickel, Leonhard Unverdorben, Erwin Dietz, Juergen Patzlaff | 2003-05-20 |
| 6562121 | Conditioning of organic pigments | Uwe Nickel, Klaus Kund, Erwin Dietz, Olaf Schupp | 2003-05-13 |
| 6548647 | Process for preparing azo colorants | Erwin Dietz, Dieter Schnaitmann, Christian Wille, Leonhard Unverdorben, Klaus Saitmacher +2 more | 2003-04-15 |
| 6537364 | Process for fine division of organic pigments by precipitation | Erwin Dietz, Dieter Schnaitmann, Christian Wille, Leonhard Unverdorben, Klaus Brychcy | 2003-03-25 |
| 6521756 | Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form | Gerhard Wilker, Manfred Urban, Martin Bohmer, Erwin Dietz | 2003-02-18 |
| 6504045 | Crystal polymorphs of a yellow disazo colorant, and their preparation | Ruediger Jung, Hans Joachim Metz, Martin Schmidt, Olaf Schupp, Andreas Wacker | 2003-01-07 |