Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7342134 | Method for the distillative recovery of toluylenediamine | Carsten Knoesche, Martin Sohn, Ulrich Penzel, Hans-Juergen Pallasch, Gunter Georgi +4 more | 2008-03-11 |
| 7230130 | Process for preparing methylenedianiline and methylenebis (phenylisocyanate) | Eckhard Ströfer, Jan Jacobs, Wilfried Seyfert, Olaf Schweers, Volker Scharr +1 more | 2007-06-12 |
| 6900348 | Light isocyanates, method for producing them and use thereof | Martin Reif, Peter van den Abeel, Filip Nevejans, Ulrich Penzel, Volker Scharr | 2005-05-31 |
| 6831192 | Process for preparing methylenedianiline and methylenebis(phenyl isocyanate) | Eckhard Ströfer, Jan Jacobs, Wilfried Seyfert, Olaf Schweers, Volker Scharr +1 more | 2004-12-14 |
| 6673960 | Work-up of distillation residues from the synthesis of toluene diisocyanate | Markus Maurer, Michael Sander, Eckhard Ströfer, Rene Leuthold, Burghard Hantel +2 more | 2004-01-06 |
| 6576788 | METHOD FOR PRODUCING MIXTURES CONSISTING OF DIPHENYLMETHANE DIISOCYANATES AND POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATES CONTAINING A REDUCED AMOUNT OF CHLORINATED SECONDARY PRODUCTS AND WITH A REDUCED IODINE COLOR INDEX | Ulrich Penzel, Volker Scharr, Dieter Starosta, Hilmar Boesel, Eckhard Ströfer +8 more | 2003-06-10 |
| 6433219 | Method for the production of methylenedi(phenylamine and methylenedi(phenyl isocyanate) | Eckhard Ströfer, Jan Jacobs, Wilfried Seyfert, Olaf Schweers, Volker Scharr +1 more | 2002-08-13 |
| 6410778 | Method of producing organic diurethanes and/or polyurethanes and their use in the production of di and/or polyisocyanates | Gerhard Laqua, Ulrich Schoner, Andreas Otterbach | 2002-06-25 |
| 6350911 | Method for producing amines | Michael Sander, Ulrich Penzel, Eckhard Ströfer, Dieter Stützer, Jörn Müller +5 more | 2002-02-26 |
| 5756063 | Process for manufacturing isocyanates and producing reagent grade hydrochloric acid therefrom | K. Edward Nuernberg | 1998-05-26 |
| 5616784 | Thermal cleavage of carbamic esters | Andreas Otterbach, Otto Mattner, Franz Merger, Wolfgang Schwarz, Eckhardt Brandt +2 more | 1997-04-01 |
| 5461174 | Method of reacting carboxylic chlorides dissolved in carboxylates | Joerg Therre, David Agar | 1995-10-24 |
| 5386053 | Multistep, continuous preparation of organic polyisocyanates | Andreas Otterbach, Franz Merger, Wolfgang Schwarz, Eckhardt Brandt, Peter Magnussen +1 more | 1995-01-31 |
| 5362399 | Removal of water from a phosgene recycle stream | Erwin Brunner | 1994-11-08 |