Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6086846 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wilfried Burow, Wolfgang Oehlert, Ulrike Pitzer | 2000-07-11 |
| 5837216 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wilfried Burow, Wolfgang Oehlert, Ulrike Pitzer | 1998-11-17 |
| 4358431 | Production of magnetic iron oxides | Horst Brunn, Peter Kiemle, Franz Hund | 1982-11-09 |
| 4234348 | Process for the production of iron oxide red pigments | Horst Brunn, Franz Hund | 1980-11-18 |