Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4343780 | Process for the separation of solids from phosphoric acid | Friedrich Wolstein, Wolfgang Epper | 1982-08-10 |
| 4181703 | Method for the treatment of phosphate rock | Wilhelm Wengeler, Friedrich Wolstein | 1980-01-01 |