Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7537749 | Method for processing iron-laden spent sulfuric acid | Gerhard Auer, Benno Laubach | 2009-05-26 |
| 6080233 | Cobalt-containing iron oxide pigments, process for producing the same and magnetic recording medium containing the same | — | 2000-06-27 |
| 5837051 | Process for the thermal treatment of iron oxides in a circulating fluidized bed | Jorg Krekel, Horst Brunn | 1998-11-17 |
| 5718755 | Preparation and use of iron oxide black pigment granules | Manfred Eitel, Gunter Linde, Herbert Kunstmann | 1998-02-17 |
| 5338355 | Method of preparing goethite | Haruki Kurokawa | 1994-08-16 |