Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10882746 | Method for the purification of yellow phosphor | Jan-Gerd Hansel, Rolf Jansen | 2021-01-05 |
| 5885485 | Process for producing low-salt silica sol dispersions in low-boiling alcohols | Uwe Brekau, Hans-Dieter Block | 1999-03-23 |
| 5273735 | Process for the preparation of sodium dichromate | Rainer Weber, Hans-Dieter Block, Norbert Lonhoff | 1993-12-28 |
| 5250274 | Process for the production of sodium dichromate | Norbert Lonhoff, Bernhard Spreckelmeyer, Hans-Dieter Block, Rainer Weber, Jost Halstenberg | 1993-10-05 |