Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667579 | Thermally stable iron oxide pigments, a process for their preparation and their use | Wolfgang Oehlert, Friedrich Jonas | 1997-09-16 |
| 5421878 | Pure-colored iron oxide direct red pigments, a process for their production and their use | Klaus Lerch | 1995-06-06 |
| 5416050 | Red ceramic moulded bodies as well as processes for their production | Klaus Lerch, Peter Kuske, Walter Kroner | 1995-05-16 |
| 5368640 | Transparent iron oxide pigments, processes for their production and their use | Ulrike Pitzer, Klaus Lerch | 1994-11-29 |
| 5300146 | Thermostable iron oxide pigments, processes for their production, as well as their use | Friedrich Jonas, Andreas Frankenau | 1994-04-05 |
| 5269843 | Boron-containing iron oxide pigments and a process for their preparation | Herbert Kunstmann, Horst Brunn | 1993-12-14 |
| 5269841 | Temperature-resistant black pigment, a process for its production and its use | Peter Kuske | 1993-12-14 |
| 5215584 | Process for coloring building materials | Bernd Krockert | 1993-06-01 |
| 5202043 | Process for the preparation of isometric magnetic iron oxide | Jurgen Wiese, Wilfried Burow | 1993-04-13 |
| 5164005 | Black manganese/iron oxide pigment a process for its production and its use | Peter Kuske | 1992-11-17 |
| 5164007 | Black pigment, process for its preparation and its use | — | 1992-11-17 |
| 5154769 | Process for production of black manganese/iron oxide pigment | Peter Kuske | 1992-10-13 |
| 5085706 | Synthetic pigment having the color of natural uncalcined umber and its use | Peter Kuske | 1992-02-04 |
| 5076848 | Process for the preparation of iron yellow pigments | Bernd Krockert, Helmut Printzen | 1991-12-31 |
| 5055136 | Heat-stable iron oxide black pigments, processes for their production and their use | Jurgen Wiese, Peter Kresse | 1991-10-08 |
| 5049193 | Heat stable iron oxide pigments of upsilon-Fe.sub.2 O.sub.3 structure, a process for their production and their use | Bernd Krockert, Axel Westerhaus, Horst Brunn | 1991-09-17 |
| 5032180 | Process for the production of iron oxide yellow pigments | Bernd Krockert, Helmut Printzen, Karl-Werner Ganter | 1991-07-16 |
| 5028269 | Co-containing magnetic pigments, processes for the production thereof and the use thereof | Jurgen Wiese, Peter Kiemle, Aloys Eiling | 1991-07-02 |
| 5002751 | Highly-coercive isometric iron oxides, a process for the production and the use thereof | Jurgen Wiese, Rolf Schafer, Fritz Rodi | 1991-03-26 |
| 4990189 | Iron oxide pigments, a process for their preparation and their use | Jurgen Wiese, Axel Westerhaus, Jurgen Scharschmidt | 1991-02-05 |
| 4966641 | Color intensive iron oxide black pigments obtained by the nitrobenzene reduction process and a process for its preparation | Axel Westerhaus, Karl-Werner Ganter | 1990-10-30 |
| 4773938 | Finely divided isometric hexaferrite pigments with a W-structure, processes for their preparation and their use | Ulrich Meisen, Florian Haberey | 1988-09-27 |
| 4753680 | Process for the preparation of bright, color-pure iron oxide red pigments | Wilfried Burow, Jurgen Wiese | 1988-06-28 |
| 4689086 | Stabilized magnetic pigments | Rolf Naumann, Jakob Rademachers, Fritz Rodi, Karl Waid | 1987-08-25 |
| 4686142 | Process for the production of iron oxides epitaxially coated with cobalt the coated oxides and their cue | Peter Kiemle, Jurgen Wiese | 1987-08-11 |