Issued Patents All Time
Showing 51–75 of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5523451 | Process for the continuous preparation of aryl carbonates | Johann Rechner, Norbert Schon, Hans-Josef Buysch, Stephan Kabelac | 1996-06-04 |
| 5515753 | Power wrench | Klaus Ruessmann, Thomas Beyert | 1996-05-14 |
| 5510499 | Process for the isolation of purified ethylene glycol carbonate (EGC) | Christine Mendoza-Frohn, Hans-Peter Wirges | 1996-04-23 |
| 5508442 | Reactor and continuous process to be carried out therewith for the preparation of ethylene glycol carbonate and propylene glycol carbonate | Christine Mendoza-Frohn, Hans-Josef Buysch | 1996-04-16 |
| 5498742 | Process for the continuous preparation of diaryl carbonates | Hans-Josef Buysch, Carsten Hesse, Johann Rechner, Reinhard Schomacker, Dieter Kaufmann | 1996-03-12 |
| 5495782 | Power wrench | Klaus Ruessmann, Thomas Beyert | 1996-03-05 |
| 5493004 | Process for the preparation of polysuccinimide | Torsten Groth, Winfried Joentgen, Dorde Jovcic, Hans-Joachim Traenckner | 1996-02-20 |
| 5489696 | Process for purifying ethylene glycol carbonate (EGC) by adsorption on activated carbon | Christine Mendoza-Frohn, Hans-Josef Buysch | 1996-02-06 |
| 5484576 | Fixed bed reactors having a short catalyst bed in the direction of flow | Reinhard Langer, Hans-Josef Buysch | 1996-01-16 |
| 5463102 | Process for the continuous production of aryl carbonates | Norbert Schon, Johann Rechner, Hans-Josef Buysch, Hans-Erich Gasche, Ricarda Leiberich | 1995-10-31 |
| 5449791 | Process for the preparation of propylene glycol carbonate | Christine Mendoza-Frohn, Hans-Josef Buysch | 1995-09-12 |
| 5449806 | Process for the preparation of dialkyl carbonates | Alexander Klausener, Heinz Landscheidt, Reinhard Langer | 1995-09-12 |
| 5412147 | Process for the continuous preparation of alkyl nitrites | Heinz Landscheidt, Alexander Klausener | 1995-05-02 |
| 5362901 | Process for the preparation of organic carbonates having at least one aromatic ester group | Norbert Schon, Hans-Josef Buysch | 1994-11-08 |
| 5360923 | Process for separating off alkanols, mixtures of alkanols and water or water itself from oxygen-containing organic compounds of higher carbon number | Andreas Nickel, Wolfgang Arlt, Ingo Janisch, Alexander Klausener | 1994-11-01 |
| 5359118 | Process for the continuous preparation of dialkyl carbonates | Franz-Josef Mais, Hans-Josef Buysch, Reinhard Langer, Alexander Klausener | 1994-10-25 |
| 5350862 | Process for the preparation of ethylene glycol carbonate | Hans-Josef Buysch, Alexander Klausener, Franz-Josef Mais, Christine Mendoza-Frohn | 1994-09-27 |
| 5344954 | Process for the preparation of diaryl carbonates | Norbert Schon, Hans-Josef Buysch, Reinhard Langer | 1994-09-06 |
| 5334742 | Process for the continuous preparation of diaryl carbonates from dialkyl carbonates | Norbert Schon, Reinhard Langer, Hans-Josef Buysch | 1994-08-02 |
| 5311797 | Pressure-operated power wrench | Klaus Ruessmann, Thomas Beyert | 1994-05-17 |
| 5298659 | Method for the preparation of azomethines | Reinhard Langer, Hans-Josef Buysch | 1994-03-29 |
| 5292953 | Process for the preparation of azomethines | Reinhard Langer, Hans-Josef Buysch | 1994-03-08 |
| 5274163 | Process for the preparation of dialkyl carbonates | Johann Rechner, Alexander Klausener, Hans-Josef Buysch | 1993-12-28 |
| 5003847 | Hydraulic power wrench | — | 1991-04-02 |
| 4805496 | Hydraulic power wrench | Alois Meyer, Karl-Richard Hirtsiefer, Karl Beuke | 1989-02-21 |