Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10815193 | Process for providing hydrogen chloride for chemical reactions | Jürgen Arras, Christian Steffens | 2020-10-27 |
| 10676448 | Method for producing TDI-trimerisates with high purity | Josef Sanders, Andreas Hecking, Reinhard Halpaap, Frank Richter, Oswald Wilmes +3 more | 2020-06-09 |
| 10189945 | Method for producing light-coloured TDI-polyisocyanates | Josef Sanders, Andreas Hecking, Reinhard Halpaap, Frank Richter, Oswald Wilmes +2 more | 2019-01-29 |
| 10131641 | Method for producing TDI-trimerisates with high purity | Josef Sanders, Andreas Hecking, Reinhard Halpaap, Frank Richter, Oswald Wilmes +3 more | 2018-11-20 |
| 10112892 | Process for preparing polyisocyanates | Jürgen Arras, Christian Steffens, Dietmar Wastian, Manfred Keller-Killewald, Holger Conzelmann | 2018-10-30 |
| 9688619 | Process for obtaining organic isocyanates from distillation residues from isocyanate preparation | Klaus Tidow, Andreas Hecking, Frank Richter, Friedhelm Steffens | 2017-06-27 |
| 9376377 | Method for producing isocyanates | Friedhelm Steffens, Markus Hollaus | 2016-06-28 |