Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5759403 | Method for purifying waste water using activated slude to increase purification yields | Frederic Clauss, Norbert Wamser, Manfred Hangl, Harald Trooper | 1998-06-02 |
| 5252231 | Process and reactor for water treatment using a granular bed adapted to float during cleaning | — | 1993-10-12 |
| 4915884 | Process for production of granular material for water treatment | Yves Aurelle, Michel Roustan, Henri Roques | 1990-04-10 |