Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5736407 | Process for determining the thickening effect of silicon dioxide | Thomas Henning, Guenther Michael | 1998-04-07 |
| 4721530 | Method for increasing the thickening action of pyrogenically produced silicon dioxide | Manfred Ettlinger, Johann Mathias | 1988-01-26 |