Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7584629 | Separation of a substance mixture consisting of hydrogen chloride and phosgene | Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch +3 more | 2009-09-08 |
| 7524405 | Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent | Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch +3 more | 2009-04-28 |
| 7408083 | Method for the production of diaminodiarylmethanes | Ulrich Steinbrenner, Eckhard Stroefer, Martin Sohn, Veronika Quaschning, Helmut Moehwald +3 more | 2008-08-05 |
| 7230130 | Process for preparing methylenedianiline and methylenebis (phenylisocyanate) | Eckhard Ströfer, Wilfried Seyfert, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more | 2007-06-12 |
| 6916953 | Integrated process for preparing isocyanates | Christian Walsdorff, Martin Fiene, Eckhard Ströfer, Klaus Harth, Filip Deberdt | 2005-07-12 |
| 6831192 | Process for preparing methylenedianiline and methylenebis(phenyl isocyanate) | Eckhard Ströfer, Wilfried Seyfert, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more | 2004-12-14 |
| 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, Wilfried Seyfert, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more | 2002-08-13 |