Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5116419 | Process for the preparation of magnetic iron oxides and the pigments obtained therefrom | Hendrik Kathrein | 1992-05-26 |
| 5028269 | Co-containing magnetic pigments, processes for the production thereof and the use thereof | Gunter Buxbaum, Jurgen Wiese, Aloys Eiling | 1991-07-02 |
| 4933014 | Magnetic iron oxide pigments and a process for their preparation | Hendrik Kathrein, Fritz Rodi, Aloys Eiling | 1990-06-12 |
| 4923519 | Magnetic iron oxide pigments and a process for their preparation | Fritz Rodi, Aloys Eiling, Hendrik Kathrein | 1990-05-08 |
| 4919727 | Oxidation resistant, heat resistant iron oxide black pigments, a process for their preparation and their use | Wilfried Burow, Gerd-Hermann Schulten | 1990-04-24 |
| 4686142 | Process for the production of iron oxides epitaxially coated with cobalt the coated oxides and their cue | Jurgen Wiese, Gunter Buxbaum | 1987-08-11 |
| 4378252 | Magnetic separation to improve purity of iron oxide pigments | Franz Hund, Ingo Pflugmacher, Wolfgang Rambold | 1983-03-29 |
| 4358431 | Production of magnetic iron oxides | Horst Brunn, Franz Hund, Heribert Bade | 1982-11-09 |