Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740781 | Process for separating reaction mixtures and recycling quaternary salts and bases | Peter Fischer, Sven Michael Hansen | 2004-05-25 |
| 6734319 | Separation of impurities and/or valuable substances from solutions containing diaryl carbonate by solution crystallization | Sven Michael Hansen, Peter Fischer, Hans-Peter Wirges | 2004-05-11 |
| 6734325 | Process for the separation of reaction mixtures and the recirculation of quaternary salts | Sven Michael Hansen, Peter Fischer, Michael Traving | 2004-05-11 |
| 6727393 | Process for the preparation of organic solutions | Sven Michael Hansen, Peter Fischer, Michael Traving | 2004-04-27 |