Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4589906 | Inorganic depot fertilizers | Horst Brunn, Johannes Niggemann, Peter Kohler | 1986-05-20 |
| 4492600 | Corrosion-inhibiting paints and lacquers | Horst Brunn, Wolfgang Rambold, Peter Kresse, Gerd von Szadkowski | 1985-01-08 |
| 4443264 | Halogen-free zinc ferrite yellow pigments containing alumina and phosphorus oxide and production | Willi Hennings, Horst Brunn, Peter Kresse, Wolfgang Rambold | 1984-04-17 |
| 4404254 | Production of lamellar iron oxide pigments | Gerhard Franz | 1983-09-13 |
| 4400432 | Coating iron oxide particles for magnetic recording | Gunter Buxbaum, Ingo Pflugmacher, Volker Hahnkamm, Peter Woditsch | 1983-08-23 |
| 4378252 | Magnetic separation to improve purity of iron oxide pigments | Peter Kiemle, Ingo Pflugmacher, Wolfgang Rambold | 1983-03-29 |
| 4369265 | Readily dispersible silicone-coated finely divided solids | Gunter Buxbaum, Ottfried Schlak, Lutz Leitner | 1983-01-18 |
| 4358431 | Production of magnetic iron oxides | Horst Brunn, Peter Kiemle, Heribert Bade | 1982-11-09 |
| 4323596 | Coating iron oxide particles for magnetic recording | Gunter Buxbaum, Ingo Pflugmacher, Volker Hahnkamm, Peter Woditsch | 1982-04-06 |
| 4290799 | Ferromagnetic metal pigment essentially consisting of iron and a process for its production | Gerhard Schroeder, Gunter Buxbaum, Heinrich-Christian Schopper, Rolf Naumann | 1981-09-22 |
| 4285726 | Active anti-corrosion pigments based on calcium oxide, aluminium oxide and iron oxide | Peter Kresse | 1981-08-25 |
| 4264462 | Stabilization of magnetite pigments with heterocyclic nitrogen compounds | Gunter Buxbaum, Bernd Stephan, Gerhard Schroeder | 1981-04-28 |
| 4234348 | Process for the production of iron oxide red pigments | Horst Brunn, Heribert Bade | 1980-11-18 |
| 4211565 | Iron oxide-based anti-corrosion pigments | Gunter Linde, Peter Kresse | 1980-07-08 |