Issued Patents All Time
Showing 1–4 of 4 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, Karl-Werner Ganter | 1991-09-17 |
| 4919727 | Oxidation resistant, heat resistant iron oxide black pigments, a process for their preparation and their use | Wilfried Burow, Peter Kiemle | 1990-04-24 |
| 4911760 | Color pure iron oxide pigments, a process for their preparation | Wilfried Burow, Hans-Ulrich Hofs, Karl-Werner Ganter | 1990-03-27 |
| 4701221 | Process for the production of black pigments based on iron | Horst Brunn, Werner Fuhr | 1987-10-20 |