Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7608168 | Alkanolammonium-containing triazinyl flavonate whiteners | Bernhard Hunke | 2009-10-27 |
| 7258815 | Use of brighteners for the preparation of coating slips | Karl-Heinz Drenker, Bernhard Hunke, Bernd Hauschel, Reiner Gottschalk, Claudia Hundertmark | 2007-08-21 |
| 6489382 | Preparations of solids containing graft copolymers | Bernd Hauschel, Peter-Roger Nyssen, Dirk Pfutzenreuter | 2002-12-03 |
| 4424349 | Process for the preparation of cationic hydrazone dyestuffs | — | 1984-01-03 |
| 4349670 | Process for the preparation of cationic dyestuffs | Roderich Raue | 1982-09-14 |
| 4310664 | Process for the preparation of pyridine-4-aldehyde phenylhydrazones | Alfred Brack | 1982-01-12 |