Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10221326 | Production of red iron oxide pigment | Waldemar Czaplik, Juergen Kischkewitz, Huajun Li | 2019-03-05 |
| 7294192 | Heat-stable zinc ferrite colour pigments, process for preparing them and their use | Carsten Rosenhahn, Horst Brunn | 2007-11-13 |
| 6117228 | Heat-stable iron oxide yellow pigments | Wilfried Burow | 2000-09-12 |
| 6086846 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wilfried Burow, Ulrike Pitzer, Heribert Bade | 2000-07-11 |
| 5837216 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wilfried Burow, Ulrike Pitzer, Heribert Bade | 1998-11-17 |
| 5730794 | Use of synthetic, bainite-rich iron raw materials for preparing iron oxide pigments | Wilfried Burow, Bernd Iskluth | 1998-03-24 |
| 5667579 | Thermally stable iron oxide pigments, a process for their preparation and their use | Friedrich Jonas, Gunter Buxbaum | 1997-09-16 |
| 5665157 | Clean color shade, yellow-tinged red iron oxide pigments, and a process for their manufacture, and their use | Wilfried Burow, Horst Brunn, Herbert Kunstmann | 1997-09-09 |