Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5229000 | Apparatus and method for the separation of a viscous mixture | Hedi Ben-Nasr, Klaus Reimann | 1993-07-20 |
| 4532992 | Method for recovering petroleum | Hubert Coenen | 1985-08-06 |
| 4522707 | Method for processing used oil | Hubert Coenen | 1985-06-11 |
| 4485003 | Supercritical extraction and simultaneous catalytic hydrogenation of coal | Hubert Coenen, Rainer Hagen | 1984-11-27 |
| 4446921 | Method for underground gasification of solid fuels | Hubert Coenen | 1984-05-08 |
| 4215101 | Method and apparatus for performing chemical and/or physical treatments | Dietrich Radke, Hans Klein, Carlos Arbeletche | 1980-07-29 |