Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7541014 | Pyrogenically produced silica | Martin Moerters, Kai Schumacher | 2009-06-02 |
| 7537833 | Pyrogenically produced silicon dioxide powder and dispersion thereof | Kai Schumacher, Ralph Brandes, Matthias Rochnia, Takeyoshi Shibasaki, Naruyasu Ishibashi | 2009-05-26 |
| 6080232 | Spherical color pigments, process for their production and use thereof | Jorg Sperlich, Ralph Brandes, Stipan Katusic, Andreas Schulz | 2000-06-27 |
| 6074754 | Spherical pigments, process for producing them and use thereof | Werner Hartmann, Stipan Katusic, Andreas Schulz, Norbert Giesecke, Ralph Brandes +1 more | 2000-06-13 |
| 5959005 | Silanized silica | Werner Hartmann, Juergen Meyer, Thomas Hennig, Henning Karbe, Uwe Schachtely | 1999-09-28 |
| 5852768 | Process for producing precious metal powders | Werner Hartmann, Stipan Katusic, Karl-Anton Starz | 1998-12-22 |
| 5789628 | Production of 2,2'-bis (4-hydroxyphenyl) propanes in the presence of organopolysiloxanes containing sulphonate and mercapto groups | Emmanuel Auer, Stefan Wieland, Hans Lansink-Rotgerink, Heike Riedemann | 1998-08-04 |