Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7144455 | Process for preparing yellow iron oxide pigments with CaCo3 precipitant | Ulrich Meisen, Horst Brunn, Holger Friedrich | 2006-12-05 |
| 5480570 | Low coercive iron oxide pigments and a process for their preparation | Hendrik Kathrein, Gerhard Franz | 1996-01-02 |
| 5322563 | Process for coloring building materials | Bernd Krockert, Gunter Linde | 1994-06-21 |