Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7416596 | Use of a pigment composition comprising mixed crystals based on CI pigment yellow 74 | Karl-Heinz Schweikart, David Blum, Felix Grimm, Martin Schmidt | 2008-08-26 |
| 7297200 | Water-soluble yellow azo dyes | Andreas Wuzik, Heidemarie Menzel | 2007-11-20 |
| 7066993 | Colorant composition | Andreas Wuzik, Heidemarie Menzel | 2006-06-27 |
| 7060124 | Dye combination | Andreas Wuzik, Heidemarie Menzel | 2006-06-13 |
| 7008475 | Water-based colorant preparations | Rudolf Randler, Ulrike Rohr, Ruediger Baur, Hans-Tobias Macholdt, Heidemarie Menzel | 2006-03-07 |
| 6749674 | Black trisazo metal complex dyes | Andreas Wuzik | 2004-06-15 |
| 6596067 | Colorant mixture | Heidemarie Menzel, Andreas Wuzik | 2003-07-22 |
| 6464768 | Water-soluble stilbene dyes, their preparation and use | Wolfgang Bauer, Heidemarie Menzel, Reinhard Pedrazzi | 2002-10-15 |
| 6432185 | Red acid dyes for injet printing and paper dyeing | Wolfgang Bauer, Heidemarie Menzel, Reinhard Pedrazzi | 2002-08-13 |
| 6406527 | Water-soluble red acid dyes, their preparation and use | Wolfgang Bauer, Heidemarie Menzel, Reinhard Pedrazzi | 2002-06-18 |
| 6406528 | Use of improved cyan pigments in inkjet inks | Hans-Tobias Macholdt, Ruediger Baur, Eduard Michel, Heidemarie Menzel, Andreas Harz | 2002-06-18 |
| 6391507 | Cyan pigments in electrophotographic toners and developers | Hans-Tobias Macholdt, Ruediger Baur, Eduard Michel, Heidemarie Menzel, Andreas Harz | 2002-05-21 |
| 5166338 | Water-soluble fiber-reactive dyes and preparation and use thereof | Holger M. Buch, Hartmut Springer | 1992-11-24 |
| 4960940 | Bis(hydroxyethylsulfonylmethyl)anilines and a process for their preparation | Theodor Papenfuhs | 1990-10-02 |