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, Helmut Printzen, Hans-Ulrich Hofs | 1993-02-09 |
| 4897166 | Antifoaming additive for acid liquids | Detlef Melzer, Erhardt Tabel | 1990-01-30 |
| 4491619 | Thermostable iron oxide pigments | Peter Kohler, Heinrich Heine | 1985-01-01 |
| 4470844 | Agglomerated ferromagnetic iron particles | Jakob Rademachers, Rolf Naumann, Gunter Buxbaum, Wolfgang Rambold | 1984-09-11 |
| 4325739 | Magnetic metal and alloy pigments | Helmut Steinberger, Artur Botta, Rolf Naumann, Lutz Leitner, Heinrich Heine | 1982-04-20 |