Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7056855 | Liquid tetrabutyl ammonium phenolate formulation | Ursula Jansen, Johann Rechner | 2006-06-06 |
| 6605191 | Method for reprocessing reaction mixtures containing diaryl carbonate | Ursula Jansen, Johann Rechner, Claus-Peter Reisinger, Rob Eek, Kaspar Hallenberger +1 more | 2003-08-12 |
| 6548445 | Supported catalysts containing a platinum metal and process for preparing diaryl carbonates | Hans-Josef Buysch, Jorg-Dietrich Jentsch, Johann Rechner, Eberhard Zirngiebl | 2003-04-15 |
| 6437166 | Method for reprocessing reaction mixtures containing diaryl carbonate | Ursula Jansen, Johann Rechner, Claus-Peter Reisinger, Rob Eek, Kaspar Hallenberger +1 more | 2002-08-20 |
| 6291392 | Catalysts containing a platinum group metal and produced in a sol-gel method, as well as a method for producing diarylcarbonates | Ulrich Notheis, Johann Rechner | 2001-09-18 |
| 6242632 | Supported catalysts containing a platinum group metal and method for producing diarylcarbonates | Ulrich Notheis, Johann Rechner | 2001-06-05 |
| 6177538 | Method for producing tetrabutyl ammonium phenolate diphenol adduct | Ursula Jansen, Johann Rechner | 2001-01-23 |
| 6071843 | Process for reactivating catalyst systems containing a platinum group metal | Hans-Josef Buysch, Johann Rechner | 2000-06-06 |
| 6001768 | Supported catalysts containing a platinum metal and process for preparing diaryl carbonates | Hans-Josef Buysch, Jorg-Dietrich Jentsch, Johann Rechner, Eberhard Zirngiebl | 1999-12-14 |
| 5965472 | Recovery of catalyst systems from diaryl carbonate-containing reaction solutions by suspension crystallization | Hans-Josef Buysch, Johann Rechner, Hans-Peter Wirges | 1999-10-12 |
| 5856554 | Process for producing diaryl carbonates | Hans-Josef Buysch, Johann Rechner | 1999-01-05 |
| 5824816 | Recovery of catalyst systems from diarylcarbonate-containing reaction mixtures by melt crystallization | Hans-Josef Buysch, Johann Rechner, Hans-Peter Wirges | 1998-10-20 |
| 5821377 | Process for the continuous production of diaryl carbonates | Hans-Josef Buysch, Johann Rechner | 1998-10-13 |
| 5739258 | Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom | Gottfried Zaby, Hans-Josef Buysch, Steffen Kuhling, Johann Rechner | 1998-04-14 |
| 5712406 | Method of extractive separation of diaryl carbonates and the original aromatic hydroxy compounds from reaction solutions | Hans-Josef Buysch, Johann Rechner | 1998-01-27 |
| 5663408 | Process for preparing diaryl carbonates | Hans-Josef Buysch, Johann Rechner | 1997-09-02 |
| 5625091 | Process for the production of diaryl carbonates | Hans-Josef Buysch, Johann Rechner | 1997-04-29 |
| 5502232 | Process for preparing diaryl carbonates | Hans-Josef Buysch, Joachim Dohm, Johann Rechner, Dieter Kaufmann | 1996-03-26 |
| 5498742 | Process for the continuous preparation of diaryl carbonates | Hans-Josef Buysch, Johann Rechner, Reinhard Schomacker, Paul Wagner, Dieter Kaufmann | 1996-03-12 |
| 5334750 | Process for the preparation of cinnamic acid derivatives | Dieter Kaufmann, Thomas Himmler | 1994-08-02 |