Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6514387 | Rectifying column for extractive distillation of close-boiling or azeotropic boiling mixtures | Gerd Emmrich, Bärbel Kolbe, Helmut Gehrke, Frank Klaus Ennenbach | 2003-02-04 |
| 5767332 | Process and apparatus for producing aromatic hydrocarbon composition | Hans-Jurgen Vollmer, Reiner Wieczorkowski, Thottakudi Ramanuja Narasimhan | 1998-06-16 |
| 5723026 | Process for recovering pure benzene and pure toluene from aromatic hydrocarbon products | Martin Leisse, Hans-Jurgen Vollmer | 1998-03-03 |