Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9630866 | Process for workup of NOx-containing offgases from wastewater streams of nitration plants | Ruediger Fritz, Renate Hempel, Michael Zoellinger, Holger Allardt | 2017-04-25 |
| 8637712 | Prevention of precipitation from nitrated aromatic crude products | Holger Allardt, Andreas Raichle, Johannes Büttner, Michael Zollinger, Stefanie Haase +1 more | 2014-01-28 |
| 8529771 | Acidic sludge adsorption of DNT wastewaters | Ruediger Fritz, Renate Hempel, Michael Zoellinger, Anne-Kathrin Merten, Doris Zschieschang +4 more | 2013-09-10 |
| 7449610 | Method for extracting nitrocresols from waste water produced in the manufacture of mononitrotoluene and use of said extract | Johannes Buettner, Holger Allardt, Reinhard Tonder, Michael Reichelt | 2008-11-11 |