Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5783651 | Process for the production of poly (diorganosiloxane)/polycarbonate block copolymers | Annett Konig | 1998-07-21 |
| 5767224 | Two-step process for the production of thermoplastic polycarbonate | Klaus Schebesta, Uwe Hucks, Martin Ullrich, Heinrich Schuchardt, Rolf Bachmann +4 more | 1998-06-16 |
| 5756641 | Process for producing thermoplastic polycarbonate | Gottfried Zaby, Uwe Hucks, Thomas Fischer | 1998-05-26 |
| 5739258 | Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom | Gottfried Zaby, Hans-Josef Buysch, Carsten Hesse, Johann Rechner | 1998-04-14 |
| 5734004 | Process for the purification of carbonic acid diaryl ester | Kaspar Hallenberger, Pieter Ooms, Hans-Josef Buysch, Gunther Jeromin | 1998-03-31 |
| 5710310 | Process for the continuous production of diaryl carbonates | Pieter Ooms, Hans-Josef Buysch, Gottfried Zaby | 1998-01-20 |
| 5652313 | Two-stage process for the manufacture of thermoplastic polycarbonate | Uwe Hucks, Gottfried Zaby, Claus Wulff | 1997-07-29 |
| 5652275 | Process for the chemical recycling of polycarbonates | Hans-Josef Buysch | 1997-07-29 |
| 5652324 | Process for the production of thermoplastic polycarbonate | Uwe Hucks, Thomas Fischer, Gottfried Zaby, Franz Ferdinand Rhiel | 1997-07-29 |
| 5648437 | Process for the manufacture of thermoplastic polycarbonate | Thomas Fischer, Rolf Bachmann, Uwe Hucks, Franz Ferdinand Rhiel | 1997-07-15 |
| 5444148 | Improved transesterification process for the production of polycarbonates | Wolfgang Alewelt, Hermann Kauth | 1995-08-22 |
| 5440066 | Process for splitting polycarbonates | Hans-Josef Buysch, Norbert Schon, Heinrich Hähnsen | 1995-08-08 |
| 5418316 | Guanidine-derived catalyts for preparing polycarbonates by transesterification | Hermann Kauth, Wolfgang Alewelt | 1995-05-23 |
| 5399659 | Two-stage process for the production of thermoplastic polycarbonate | Hermann Kauth, Wolfgang Alewelt | 1995-03-21 |
| 5391802 | Process for cleaving polycarbonates into bisphenols and diaryl carbonates | Hans-Josef Buysch, Norbert Schon | 1995-02-21 |
| 5384389 | Process for the production of polycarbonates | Wolfgang Alewelt, Hermann Kauth | 1995-01-24 |
| 5373082 | Process for the production of thermoplastic polycarbonates | Hermann Kauth, Wolfgang Alewelt, Dieter Freitag | 1994-12-13 |
| 5340905 | Process for the preparation of thermoplastic polycarbonates | Hermann Kauth, Wolfgang Alewelt, Dieter Freitag | 1994-08-23 |
| 5314985 | Molten, catalytic process for the preparation of polycarbonates | Wolfgang Alewelt, Hermann Kauth, Dieter Freitag | 1994-05-24 |
| 5266716 | Process for the splitting of polycarbonates | Hans-Josef Buysch, Norbert Schon | 1993-11-30 |
| 5116918 | Crosslinked copolymers based on cyclic esters and carbonates | Hartwig Hocker, Helmut Keul, Edgar Leitz, Norbert Schon | 1992-05-26 |