Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5049195 | Color pure iron oxide pigments, a process for their preparation and their use | Wilfried Burow, Hans-Ulrich Hofs, Gerd-Hermann Schulten | 1991-09-17 |
| 5032180 | Process for the production of iron oxide yellow pigments | Bernd Krockert, Helmut Printzen, Gunter Buxbaum | 1991-07-16 |
| 4966641 | Color intensive iron oxide black pigments obtained by the nitrobenzene reduction process and a process for its preparation | Axel Westerhaus, Gunter Buxbaum | 1990-10-30 |
| 4921542 | Finely divided iron oxide black pigments, a process for their preparation and their use | Jakob Rademachers, Wolfgang Rambold, Gunter Linde | 1990-05-01 |
| 4911760 | Color pure iron oxide pigments, a process for their preparation | Wilfried Burow, Hans-Ulrich Hofs, Gerd-Hermann Schulten | 1990-03-27 |