Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4656014 | Process for reducing the NO.sub.x content in waste gases | — | 1987-04-07 |
| 4347228 | Process for defluorination of phosphoric acid | Gerhard Koch | 1982-08-31 |
| 4343780 | Process for the separation of solids from phosphoric acid | Egbert Hoffmann, Wolfgang Epper | 1982-08-10 |
| 4181703 | Method for the treatment of phosphate rock | Wilhelm Wengeler, Egbert Hoffmann | 1980-01-01 |