Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7230130 | Process for preparing methylenedianiline and methylenebis (phenylisocyanate) | Eckhard Ströfer, Jan Jacobs, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more | 2007-06-12 |
| 6831192 | Process for preparing methylenedianiline and methylenebis(phenyl isocyanate) | Eckhard Ströfer, Jan Jacobs, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more | 2004-12-14 |
| 6433219 | Method for the production of methylenedi(phenylamine and methylenedi(phenyl isocyanate) | Eckhard Ströfer, Jan Jacobs, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more | 2002-08-13 |
| 6229043 | Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content | Dietrich Scherzer, Bernd Bruchmann, Roland Minges, Peter Keller, Willy van Pee +4 more | 2001-05-08 |
| 5159107 | Continuous preparation of alkyl pentenoates | Paul Panitz, Heinrich Reitz, Gunter Schuch | 1992-10-27 |
| 4946029 | Purification of carboxylic esters which contain aldehydes, acetals and/or unsaturated compounds | Gerhard Frank, Hubert Lendle, Peter Stops | 1990-08-07 |
| 4810798 | Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures | Hubert Lendle, Paul Panitz, Peter Stops | 1989-03-07 |