Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7166157 | Method for the surface treatment of a titanium dioxide pigment | Lydia Drews-Nicolai, Siegfried Bluemel, Volker Schmitt | 2007-01-23 |
| 6340387 | Organically post-treated pigments and methods for their production | Jürgen Orth-Gerber, Siegfried Blumel | 2002-01-22 |
| 5932757 | Mixture of oligomers of condensed alkylalkoxysilanes | Burkhard Standke, Roland Edelmann, Albert-Johannes Frings, Michael Horn, Peter Jenkner +3 more | 1999-08-03 |
| 5451252 | Subpigmentary titanium dioxide with improved photostability | Rolf Schwindt, Manfred Kluwig | 1995-09-19 |
| 5215580 | Process for the production of a fine particle titanium dioxide | Edgar Klein, Franz Rosendahl | 1993-06-01 |