Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7294191 | Pure-coloured, readily dispersible iron oxide red pigments with high grinding stability | Carsten Rosenhahn, Volker Schneider | 2007-11-13 |
| 6117228 | Heat-stable iron oxide yellow pigments | Wolfgang Oehlert | 2000-09-12 |
| 6086846 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wolfgang Oehlert, Ulrike Pitzer, Heribert Bade | 2000-07-11 |
| 5899566 | Reactor for corrosive reaction mixtures | Siegfried Zingel, Martin Anstock, Dieter Zeitz, Olaf Schmidt-Park | 1999-05-04 |
| 5837216 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wolfgang Oehlert, Ulrike Pitzer, Heribert Bade | 1998-11-17 |
| 5730794 | Use of synthetic, bainite-rich iron raw materials for preparing iron oxide pigments | Wolfgang Oehlert, Bernd Iskluth | 1998-03-24 |
| 5665157 | Clean color shade, yellow-tinged red iron oxide pigments, and a process for their manufacture, and their use | Wolfgang Oehlert, Horst Brunn, Herbert Kunstmann | 1997-09-09 |
| 5202043 | Process for the preparation of isometric magnetic iron oxide | Jurgen Wiese, Gunter Buxbaum | 1993-04-13 |
| 5059250 | Red iron oxide pigments with improved coloring properties | Horst Brunn, Peter Kresse, Hans Sander | 1991-10-22 |
| 5049195 | Color pure iron oxide pigments, a process for their preparation and their use | Hans-Ulrich Hofs, Karl-Werner Ganter, Gerd-Hermann Schulten | 1991-09-17 |
| 5035748 | Storage-stable inorganic pigments containing specific polyorganosiloxanes with long chain aryl and/or alkyl groups | Jurgen Kischkewitz, Ottfried Schlak | 1991-07-30 |
| 5013365 | Iron oxide black pigments, processes for their preparation and their use | Jakob Rademachers, Wolfgang Bockelmann, Kurt Schafer | 1991-05-07 |
| 4985078 | Thermostable zinc ferrite color pigments containing 0.05-0.5 wt % lithium, a process for their preparation and their use | Jakob Rademachers, Volker Wilhelm, Siegfried Keifer | 1991-01-15 |
| 4919727 | Oxidation resistant, heat resistant iron oxide black pigments, a process for their preparation and their use | Gerd-Hermann Schulten, Peter Kiemle | 1990-04-24 |
| 4911760 | Color pure iron oxide pigments, a process for their preparation | Hans-Ulrich Hofs, Karl-Werner Ganter, Gerd-Hermann Schulten | 1990-03-27 |
| 4753680 | Process for the preparation of bright, color-pure iron oxide red pigments | Jurgen Wiese, Gunter Buxbaum | 1988-06-28 |
| 4734136 | Heat resistant yellow pigments, processes for their preparation and their use | — | 1988-03-29 |
| 4698100 | Iron oxide yellow pigments having a low silking effect and a process for production thereof | Helmut Printzen, Horst Brunn, Klaus Nollen | 1987-10-06 |
| 4620879 | Iron oxide yellow pigments having a low silking effect and a process for production thereof | Helmut Printzen, Horst Brunn, Klaus Nollen | 1986-11-04 |