Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7649108 | Process for the distillation of a mixture of isomeric diisocyanatodiphenylmethanes | Ulrich Wolf, Bernd Thelen | 2010-01-19 |
| 7521576 | Process for the distillation of a mixture of isomeric diisocyanatodiphenyl-methanes | Ulrich Wolf | 2009-04-21 |
| 7108770 | Process for the purification of toluene diisocyanate incorporating a dividing-wall distillation column for the final purification | Marcus Paul Grün, Bill Brady, Berthold Keggenhoff, Kai Verkerk | 2006-09-19 |
| 6992230 | Process for the production of 1,5-dinitronaphthalene | Vera Yakovlevna Popkova, Boris Mikhaylovitch Laskin, Alexander Sergeevitch Malin, Sofia Borisovna Volkova | 2006-01-31 |
| 6271414 | Process for the isomeric separation of isocyanates | Rudiger Drope, Dieter Grenner, Hartmut Hetzel, Gerhard Wegener | 2001-08-07 |
| 5359141 | Process for the production of polynuclear aromatic polyamines | Hartmut Knofel, Michael Brockelt, Marcel Petinaux, Rudolf Uchdorf | 1994-10-25 |
| 5196591 | Process for the production of polynuclear aromatic polyamines | Hartmut Knofel, Michael Brockelt, Marcel Petinaux, Rudolf Uchdorf | 1993-03-23 |