Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10143987 | Method for dividing fluid streams | Berthold Keggenhoff, Jeffrey Bolton, Friedhelm Steffens, Marc Seekamp, Jürgen Kern +1 more | 2018-12-04 |
| 8277615 | Method for the distillative purification of slow-evaporating fluids | Oliver Pfohl, Marcus Paul Grün | 2012-10-02 |
| 7118653 | Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column | Bill Brady, Friedhelm Steffens, Berthold Keggenhoff, Kai Verkerk | 2006-10-10 |
| 5149890 | Process for the isolation of pure dinitrotoluenes | Gunther Rauchschwalbe, Heinz U. Blank, Ludwig Deibele, Kaspar Hallenberger | 1992-09-22 |