Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6596036 | Method for the production of a dye preparation based on madder root | Goverdina Christina Helena Derksen, Teris André Van Beek, Aede de Groot | 2003-07-22 |
| 5087649 | Process for the production of a dry product suitable as a paste base | Juergen Wegner, Wolfgang Dierichs, Werner Haller, Johannes Jansen, Willem Kamminga +1 more | 1992-02-11 |
| 4663491 | Copolymers of n-alkyl acrylates and maleic anhydride and their use as crystallization inhibitors for paraffin-bearing crude oils | Eduard Barthell, Miroslav Chmelir, Kurt Dahmen | 1987-05-05 |