Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5185141 | Process for the production of iron oxide yellow pigments | Bernd Krockert, Hans-Peter Biermann, Hans-Ulrich Hofs | 1993-02-09 |
| 5076848 | Process for the preparation of iron yellow pigments | Bernd Krockert, Gunter Buxbaum | 1991-12-31 |
| 5032180 | Process for the production of iron oxide yellow pigments | Bernd Krockert, Karl-Werner Ganter, Gunter Buxbaum | 1991-07-16 |
| 4698100 | Iron oxide yellow pigments having a low silking effect and a process for production thereof | Wilfried Burow, Horst Brunn, Klaus Nollen | 1987-10-06 |
| 4620879 | Iron oxide yellow pigments having a low silking effect and a process for production thereof | Wilfried Burow, Horst Brunn, Klaus Nollen | 1986-11-04 |