Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6300467 | Production of polytetrahydrofuran with terminal hydroxyl groups by changing the continuous and dispersed phase | Heinz Auer, Jurgen Ciprian, Lothar Franz, Gabriele Iffland, Alexander Weck +1 more | 2001-10-09 |
| 6037381 | Preparation of polytetrahydrofuran with terminal hydroxyl groups using ion exchangers | Wulfrich Friedemann Beer, Klaus Beiser, Jurgen Ciprian, Lothar Franz, Christof Palm +4 more | 2000-03-14 |
| 5981688 | Continuous preparation of polytetrahydrofuran by a transesterification cascade with specific destruction of foam | Heinz Auer, Klaus Beiser, Jurgen Ciprian, Lothar Franz, Ulrich-Dieter Pessel +1 more | 1999-11-09 |
| 5623082 | Preparation of acyl chlorides | Martin Decker, Rudolf Irnich, Manfred Sauerwald | 1997-04-22 |
| 5463020 | Preparation of polytetrahydrofuran or tetrahydrofuran/alkylene oxide copolymers | Rainer Becker, Michael Huellmann, Christof Palm | 1995-10-31 |
| 5200560 | Preparation of carboxylic chlorides | Thomas-Michael Kahl, Jochem Henkelmann, Leopold Hupfer, Wolfgang Schwarz | 1993-04-06 |
| 5200163 | Removal of phosgene from off-gases | Jochem Henkelmann, Thomas-Michael Kahl, Irene Troetsch-Schaller, Leopold Hupfer, Wolfgang Schwarz | 1993-04-06 |
| 5196611 | Preparation of alkyl, alkenyl, and alkynyl chlorides | Jochem Henkelmann, Irene Troetsch-Schaller, Thomas Wettling, Thomas-Michael Kahl, Leopold Hupfer +1 more | 1993-03-23 |
| 4895985 | Preparation of cyclopentanone | Martin Decker, Harro Wache | 1990-01-23 |
| 4814479 | Preparation of aromatic nitriles | Heinz Engelbach, Roland Krokoszinski, Martin Decker | 1989-03-21 |
| 4786727 | Preparation of hexamethyleneimine | Wolfgang Schroeder, Herbert Mueller | 1988-11-22 |
| 4745228 | Preparation of cyclic ketones | Martin Decker, Rolf Fischer, Rudolf Kummer, Heinz-Walter Schneider, Uwe Vagt | 1988-05-17 |
| 4521602 | Preparation of pyridines or pyrroles from .alpha.,.omega.-dinitriles | Walter Rebafka, Gerd Heilen, Klaus Halbritter | 1985-06-04 |
| 4234727 | Preparation of amines | Herbert Toussaint, Wolfgang Schroeder | 1980-11-18 |
| 4184982 | Preparation of a silicate hydrogenation catalyst | Wolfgang Schroeder | 1980-01-22 |