Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11104807 | Preparation of red iron oxide pigment | Waldemar Czaplik | 2021-08-31 |
| 9428402 | Method for producing finely divided haematite and for producing iron oxide red pigments | Guido Ketteler, Juergen Kischkewitz | 2016-08-30 |
| 7837785 | Process for the preparation of pigment granules and the use thereof | Holger Friedrich, Kai Butje | 2010-11-23 |
| 5792250 | Process for the production of inorganically coated pigments and fillers | Rolf Braun, Jurgen Kischkewitz, Hilmar Rieck | 1998-08-11 |
| 5723404 | Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides | Kai Butje, Jurgen Kischkewitz, Rolf Braun, Peter-Joachim Barenthien | 1998-03-03 |
| 5268159 | Process for the production of storable, free-flowing hydrated ferrous sulfate | — | 1993-12-07 |