Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10538478 | Catalyst modification with alkali metal, alkaline earth metal or rare earth metal ions in the continuous liquid-phase hydrogenation of nitro compounds | Armin LANGE DE OLIVEIRA, Barbara Wucher, Christian Bechtold, Michael FRIKO | 2020-01-21 |
| 9688606 | Process for acidic scrubbing of dinitrotoluene in the presence of hydrocyanic acid | Samuel Neto, Rüdiger Fritz, Holger Allardt, Yuan Shen Dai, Barbara BECKER +5 more | 2017-06-27 |
| 9630866 | Process for workup of NOx-containing offgases from wastewater streams of nitration plants | Ruediger Fritz, Michael Zoellinger, Holger Allardt, Reiner Reetz | 2017-04-25 |
| 9428441 | Method for removing HCN from crude dinitro toluene | Yuan Shen Dai, Katharina Spuhl | 2016-08-30 |
| 9249083 | Process for scrubbing dinitrotoluene | Samuel Neto, Ruediger Fritz, Holger Allardt, Barbara BECKER, Julia Leschinski +4 more | 2016-02-02 |
| 8529771 | Acidic sludge adsorption of DNT wastewaters | Ruediger Fritz, Michael Zoellinger, Anne-Kathrin Merten, Doris Zschieschang, Ina Homann +4 more | 2013-09-10 |
| 6495652 | Prepolymers containing isocyanate groups and a method for the production thereof | Michael Reichelt, Udo Rotermund, Peter Falke, Peter von Malotki, Holger Seifert | 2002-12-17 |
| 6284812 | Thermally stable rigid foams based on isocyanate and having low brittleness and low thermal conductivity | Udo Rotermund, Holger Seifert, Werner Schmiade | 2001-09-04 |
| 6274642 | Storage-stable, blowing agent-containing emulsions for producing rigid foams based on isocyanate | Udo Rotermund, Anja Biedermann, Werner Wiegmann, Marion Heinz | 2001-08-14 |
| 6063824 | Microcellular urea-containing polyurethane elastomer | Ruediger Krech, Udo Rotermund, Heinz Bollmann, Wolfgang Scholz, Manfred Genz | 2000-05-16 |
| 6037383 | Microcellular polyurethane elastomer containing urea groups | Ruediger Krech, Udo Rotermund, Heinz Bollmann, Wolfgang Scholz, Manfred Genz | 2000-03-14 |
| 5916480 | Storage-stable emulsions for producing fine-celled rigid foams based on isocyanate | Udo Rotermund, Marion Heinz, Anja Biedermann, Werner Wiegmann | 1999-06-29 |
| 5895792 | Production of rigid polyurethane foams | Udo Rotermund, Holger Seifert, Werner Wiegmann | 1999-04-20 |
| 5684092 | Production of rigid foams based on isocyanate | Holger Seifert, Gottfried Knorr, Udo Rotermund | 1997-11-04 |
| 5624969 | Production of rigid foams based on isocyanate | Holger Seifert, Gottfried Knorr, Udo Rotermund | 1997-04-29 |