Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6037381 | Preparation of polytetrahydrofuran with terminal hydroxyl groups using ion exchangers | Wulfrich Friedemann Beer, Klaus Beiser, Jurgen Ciprian, Lothar Franz, Wolfgang Franzischka +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, Wolfgang Franzischka +1 more | 1999-11-09 |
| 4912236 | Purification of tetrahydrofuran by distillation | Christof Palm, Otto H. Huchler, Erdmann Hollborn, Dieter Schmitt | 1990-03-27 |