Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11634342 | Iron oxide pigments containing Al | Kai BUETJE, Christine Kathrein, Carsten Rosenhahn, Juergen Kischkewitz, Peter Koehler | 2023-04-25 |
| 10870743 | Coated pigments for coloring PVC | Krzysztof Chlopek, Ralf Koenig | 2020-12-22 |
| 7425234 | Iron oxide pigments | Leslaw Mleczko, Georg Lamp, Ralph Weber | 2008-09-16 |
| 7387671 | Iron oxide pigments | Leslaw Mleczko | 2008-06-17 |
| 7144455 | Process for preparing yellow iron oxide pigments with CaCo3 precipitant | Horst Brunn, Karl-Heinz van Bonn, Holger Friedrich | 2006-12-05 |
| 6849196 | Process for the preparation of magnetite particles and their use | — | 2005-02-01 |
| 6806010 | Toner containing magnetite particles | — | 2004-10-19 |
| 6767529 | Process for producing magnetite particles | — | 2004-07-27 |
| 6689206 | Process for producing yellow iron oxide pigments | — | 2004-02-10 |
| 6562533 | Magnetites and their use in producing toners | — | 2003-05-13 |
| 6534032 | Process for the production of yellow iron oxide | — | 2003-03-18 |
| 6530987 | Method for producing iron oxide pigments from waste acid resulting from TiO2 production | Gerhard Auer, Gunter Lailach, Werner Schuy, Udo Julius | 2003-03-11 |
| 6508290 | Method of preparing an aluminum-containing iron oxide nucleus | — | 2003-01-21 |
| 6508877 | Process for the production of an aluminium-containing iron oxide crystallization nucleus | — | 2003-01-21 |
| 6440377 | Method for reprocessing waste acid resulting from TiO2 production | Gerhard Auer, Gunter Lailach, Werner Schuy | 2002-08-27 |
| 6416723 | Method for reprocessing waste acid to form gypsum and iron oxide | Gerhard Auer, Gunter Lailach, Werner Schuy | 2002-07-09 |
| 6280649 | Method of producing precipitated magnetites | — | 2001-08-28 |
| 6179908 | Iron oxide red pigments, process for the production of iron oxide red pigments and use thereof | Rolf Braun, Eckhard Bayer | 2001-01-30 |
| 6143194 | Magnetic iron oxide, process for its production and the use thereof | Wolfgang Korschen | 2000-11-07 |
| 6063180 | Use of free-flowing, magnetic iron oxide containing granules with 50 to 73 wt. % iron content | Wolfgang Korschen | 2000-05-16 |
| 6042642 | Iron oxide yellow pigments, a method of producing iron oxide yellow pigments and the use thereof | Rolf Braun, Eckhard Bayer | 2000-03-28 |
| 5916360 | Process for the preparation of iron oxide yellow pigments and the use thereof | Rolf Braun, Eckhard Bayer | 1999-06-29 |
| 4773938 | Finely divided isometric hexaferrite pigments with a W-structure, processes for their preparation and their use | Gunter Buxbaum, Florian Haberey | 1988-09-27 |