Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5049193 | Heat stable iron oxide pigments of upsilon-Fe.sub.2 O.sub.3 structure, a process for their production and their use | Bernd Krockert, Gunter Buxbaum, Horst Brunn | 1991-09-17 |
| 4990189 | Iron oxide pigments, a process for their preparation and their use | Jurgen Wiese, Jurgen Scharschmidt, Gunter Buxbaum | 1991-02-05 |
| 4966641 | Color intensive iron oxide black pigments obtained by the nitrobenzene reduction process and a process for its preparation | Karl-Werner Ganter, Gunter Buxbaum | 1990-10-30 |