Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6835242 | Conditioning of organic pigments | Uwe Nickel, Klaus Kund, Erwin Dietz, Olaf Schupp | 2004-12-28 |
| 6816866 | Method of changing a parameter of an operating system of a computer system | — | 2004-11-09 |
| 6723138 | Preparation of diketopyrrolopyrrole pigments | Uwe Nickel, Leonhard Unverdorben, Erwin Dietz, Juergen Patzlaff | 2004-04-20 |
| 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 |
| 6413309 | Pigment preparations comprising two or more perylene compounds | Manfred Urban, Manfred Opravil, Erwin Dietz | 2002-07-02 |
| 6409816 | Pigment preparations based on diketopyrrolopyrrole pigments with basic perylene dispersants | Erwin Dietz | 2002-06-25 |
| 6312512 | Quinacridone mixed-crystal pigments of the gamma phase | Manfred Urban, Martin Boehmer, Dieter Schnaitmann, Margit Haberlick | 2001-11-06 |
| 6252591 | Method for mapping a text-oriented user interface to a graphics user interface by means of a class library | Hans Gunter Dockweiler | 2001-06-26 |
| 6241814 | Process for preparing quinacridone pigments | Manfred Urban, Martin Boehmer, Dieter Schnaitmann | 2001-06-05 |
| 6221150 | Perylene compounds and pigment preparations | Manfred Urban, Erwin Dietz | 2001-04-24 |
| 6174361 | Process for preparing N,N'-dimethylperylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form | Manfred Urban, Martin Boehmer | 2001-01-16 |
| 5910577 | Quinoxaline-monoazo-acetarylide pigment | Hans Joachim Metz | 1999-06-08 |
| 5756691 | Water--insoluble azo colorants based on N-acetoacetyldehydrothiotoluidine | Hans Joachim Metz | 1998-05-26 |
| 5747566 | Water-insoluble azo colorants based on aminoquinazolinediones | — | 1998-05-05 |