Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7892345 | Method for producing transparent Pigment Violet 23 | Wolfgang Hoyer | 2011-02-22 |
| 7309389 | Preparation of azo colorants in microreactors and their use in electrophotographic toners and developers, powder coatings, ink jet inks and electronic medias | Ruediger Baur, Hans-Tobias Macholdt, Uwe Nickel, Christian Wille | 2007-12-18 |
| 7135266 | Preparation of azo colorants in microreactors and their use in electrophotographic toners and developers, powder coatings, ink jet inks and electronic medias | Ruediger Baur, Hans-Tobias Macholdt, Uwe Nickel, Christian Wille | 2006-11-14 |
| 6723138 | Preparation of diketopyrrolopyrrole pigments | Uwe Nickel, Joachim Weber, Erwin Dietz, Juergen Patzlaff | 2004-04-20 |
| 6649758 | Preparation of trans-thiazineindigo pigments | Petra Rothe, Bruno Piastra | 2003-11-18 |
| 6616859 | Preparation of alcoholic solutions of alkali metal alkoxides | Uwe Nickel, Joachim Weber, Erwin Dietz, Juergen Patzlaff | 2003-09-09 |
| 6582508 | Process for fine division of organic pigments | Erwin Dietz, Joachim Weber, Dieter Schnaitmann, Christian Wille | 2003-06-24 |
| 6566519 | Preparation of diketopyrrolopyrrole pigments | Uwe Nickel, Joachim Weber, Erwin Dietz, Juergen Patzlaff | 2003-05-20 |
| 6548647 | Process for preparing azo colorants | Erwin Dietz, Joachim Weber, Dieter Schnaitmann, Christian Wille, Klaus Saitmacher +2 more | 2003-04-15 |
| 6537364 | Process for fine division of organic pigments by precipitation | Erwin Dietz, Joachim Weber, Dieter Schnaitmann, Christian Wille, Klaus Brychcy | 2003-03-25 |
| 6469147 | Preparation of azo colorants in microreactors | Uwe Nickel, Rudiger Jung, Klaus Saitmacher | 2002-10-22 |
| 6436182 | Process for producing highly concentrated pigment presscakes | Uwe Nickel, Andreas Harz, Gunnar Tilch | 2002-08-20 |
| 6358308 | Finishing treatment of pigments in liquid or supercritical CO2 | Rudiger Jung, Klaus Kund, Bernd Nestler, Martin Schmidt, Rudolf Steiner | 2002-03-19 |
| 5902884 | Process for preparing N-alkylcarbazoles | Wolfgang Bauer, Klaus Delpy, Gert Nagl | 1999-05-11 |
| 5152875 | Separation of m- and p-dichlorobenzene | Siegbert Rittner, Adolf Schmidt, Rudolf Steiner | 1992-10-06 |