Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5169444 | Process for preparing calcium sulfate anhydrite | Friedrich-Wilhelm Boos | 1992-12-08 |
| 4423016 | Process for the production of dry flue gas gypsum | Rolf Huller, Barbel Limmer | 1983-12-27 |