Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5833756 | Process and plant for decontaminating solid materials contaminated with organic pollutants | Franz-Hubert Haegel, Wolfgang Clemens, Milan J. Schwuger, Katrin Stickdorn, Leslie Webb | 1998-11-10 |
| 5308490 | Sewage delivery for an activated sludge process | Markus Schroeder, Dietmar Loch, Bernhard Woeffen, Joost Groeneweg | 1994-05-03 |
| 5159694 | Portable reactor for carrying out gas-evolving biotechnological processes or gas consuming processes while maintaining a packed fixed-bed arrangement | Horst Overath, Nazir Salhani | 1992-10-27 |
| 5019266 | Waste water purification process with batchwise supply of waste water to the activated sludge tank | Erich Zanders, Thomas Raphael, Heiner Keusen, Joost Groeneweg | 1991-05-28 |
| 4793930 | Process for waste water purification employing the activated sludge process | Heinrich Keusen, Erich Zanders, Franz Hofmeister | 1988-12-27 |