Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5882485 | Process for the separation of dimethyl ether and chloromethane in mixtures | Erhard Leistner, Hans Haverkamp, Wolfgang Wendel, Michael Kleiber | 1999-03-16 |
| 5871563 | Process for purifying inert gases | Regina Witt, Joachim Burschapers, Norbert Schadler | 1999-02-16 |
| 5843286 | Process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with water as extractant | Erhard Leistner, Hans Haverkamp | 1998-12-01 |
| 5763712 | Process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with methanol as extractant | Erhard Leistner, Wolfgang Wendel | 1998-06-09 |
| 5711873 | Process for solvent recovery and apparatus suitable therefor | Siegfried Rewitzer | 1998-01-27 |
| 5618432 | Process for solvent recovery | Siegfried Rewitzer | 1997-04-08 |
| 5611840 | Process for separating out hydrogen chloride | Werner Kraus, Thomas Vernaleken, Wolfgang Schick | 1997-03-18 |
| 5507356 | Column having integrated heat exchanger | Siegfried Rewitzer | 1996-04-16 |
| 5462643 | Method for reprocessing solvent mixtures containing constituents of low volatility and apparatus suitable therefor | Georg-Emerich Miess, Karl Heinrich, Siegfried Rewitzer | 1995-10-31 |