Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6464768 | Water-soluble stilbene dyes, their preparation and use | Heidemarie Menzel, Josef Geisenberger, Reinhard Pedrazzi | 2002-10-15 |
| 6432185 | Red acid dyes for injet printing and paper dyeing | Josef Geisenberger, Heidemarie Menzel, Reinhard Pedrazzi | 2002-08-13 |
| 6406527 | Water-soluble red acid dyes, their preparation and use | Josef Geisenberger, Heidemarie Menzel, Reinhard Pedrazzi | 2002-06-18 |
| 6359131 | Process for preparing dioxazine compounds | Gert Nagl, Peter Kempter | 2002-03-19 |