Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679622 | Pyridine-2,3-dicarboximides and their use for controlling undesirable plant growth | Gerhard Hamprecht, Matthias Gerber, Helmut Walter, Karl-Otto Westphalen | 1997-10-21 |
| 5646277 | Preparation of caoprolactam | Tom Witzel | 1997-07-08 |
| 5557011 | Preparation of diamines | Tom Witzel | 1996-09-17 |
| 5502185 | Preparation of lactams | Tom Witzel | 1996-03-26 |
| 5496941 | Process for continuous purification of crude caprolactam prepared from 6-aminocapronitrile | Josef Ritz, Rolf Fischer, Werner Schnurr, Gu/ nther Achhammer, Hermann Luyken | 1996-03-05 |
| 5495014 | Preparation of caprolactam | Tom Witzel | 1996-02-27 |
| 5495016 | Preparation of caprolactam | Gunther Achhammer | 1996-02-27 |
| 5481037 | Decontamination of tertiary amines from primary and secondary amines | Tom Witzel, Klaus Stadler | 1996-01-02 |
| 5463130 | Preparation of peralkylated amines | Tom Witzel, Horst Zimmermann | 1995-10-31 |
| 5347033 | Preparation of 5-cyanovaleramide | Tom Witzel, Franz Merger | 1994-09-13 |
| 5344983 | Selective preparation of linear pentane-1,5-diamines in increased yields | Tom Witzel, Franz Merger, Claus-Ulrich Priester | 1994-09-06 |