Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10563066 | Red iron-oxide pigments with improved colour values | Waldemar Czaplik, Stephan Spiegelhauer | 2020-02-18 |
| 10479893 | Preparation of iron (III) oxide pigment | Waldemar Czaplik, Guido Ketteler | 2019-11-19 |
| 9090774 | Oil- and wax-containing compositions in piece form for the coloring of asphalt and bitumen | Krzysztof Chlopek, Lutz Kohnert, Holger Inden | 2015-07-28 |
| 8414698 | Pigment/auxiliary combination having improved colour properties | Holger Friedrich, Gerald Buchner | 2013-04-09 |
| 7942953 | Adsorption vessels | Andreas Schlegel, Peter Bailly, Klaus Rohbock | 2011-05-17 |
| 7931745 | Black pigment/auxiliary combination having improved colour strength | Holger Friedrich, Gerald Buchner | 2011-04-26 |
| 7811360 | Contact and adsorbent granules | Andreas Schlegel | 2010-10-12 |
| 7767001 | Contact and adsorbent granules | Andreas Schlegel, Peter Bailly, Klaus Rohbock | 2010-08-03 |
| 5837635 | Process for producing mixed oxide powders from deactivated denox catalysts | Gunter Linde, Hans-Joachim Schittenhelm, Gunter Lailach, Kai Butje | 1998-11-17 |
| 5792250 | Process for the production of inorganically coated pigments and fillers | Rolf Braun, Hilmar Rieck, Udo Holtmann | 1998-08-11 |
| 5723404 | Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides | Kai Butje, Rolf Braun, Udo Holtmann, Peter-Joachim Barenthien | 1998-03-03 |
| 5527519 | Finely divided, highly pure neutral zinc oxide powder, a process for its preparation and its use | Michael Miksits, Christoph Tiburtius, Kai Butje, Albrecht Warth, Franz Herzig +1 more | 1996-06-18 |
| 5468463 | Process for the preparation of very pure titanium dioxide | Kai Butje | 1995-11-21 |
| 5354923 | Process for the preparation of aromatic carbonic diesters | Norbert Schon, Hans-Josef Buysch, Eberhard Zirngiebl | 1994-10-11 |
| 5174817 | Process for the calcination of filter cakes with high solids contents being partly pre-dried in a directly heated rotary kiln | Bernd Holle, Peter Beumer, Rolf Braun, Hilmar Rieck, Gerhard Wiederhoft | 1992-12-29 |
| 5035748 | Storage-stable inorganic pigments containing specific polyorganosiloxanes with long chain aryl and/or alkyl groups | Wilfried Burow, Ottfried Schlak | 1991-07-30 |