Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6734278 | Production of polyester carbonates | Silke Kratschmer, Friedrich-Karl Bruder, Wilfried Haese, Rolf Wehrmann, Peter Fischer +2 more | 2004-05-11 |
| 6716933 | Working up of polymer synthesis solutions | Wolfgang Ebert, Thomas Fritz, Dirk Jahn, Stefan Westernacher, Frank Bruynseels +1 more | 2004-04-06 |
| 6680400 | Continuous process for the production of carboxylic acid diaryl esters | Steffen Kuhling, Johan Vanden Eynde, Dirk Van Meirvenne | 2004-01-20 |
| 6646099 | Production and use of polyester carbonates | Silke Kratschmer, Lothar Bunzel, Renate Wilms | 2003-11-11 |
| 6613869 | Containers made of a branched polycarbonate | Klaus Horn, Ralf Hufen, Peter Gebauer, Franky Bruynseels | 2003-09-02 |
| 6548691 | Process for producing carbonic acid diaryl ester | Steffen Kuhling | 2003-04-15 |
| 5444148 | Improved transesterification process for the production of polycarbonates | Steffen Kuhling, Hermann Kauth | 1995-08-22 |
| 5418316 | Guanidine-derived catalyts for preparing polycarbonates by transesterification | Steffen Kuhling, Hermann Kauth | 1995-05-23 |
| 5399659 | Two-stage process for the production of thermoplastic polycarbonate | Steffen Kuhling, Hermann Kauth | 1995-03-21 |
| 5384389 | Process for the production of polycarbonates | Hermann Kauth, Steffen Kuhling | 1995-01-24 |
| 5373082 | Process for the production of thermoplastic polycarbonates | Hermann Kauth, Steffen Kuhling, Dieter Freitag | 1994-12-13 |
| 5340905 | Process for the preparation of thermoplastic polycarbonates | Steffen Kuhling, Hermann Kauth, Dieter Freitag | 1994-08-23 |
| 5317083 | Process for isolating polycarbonates from their solutions with tube having cross sectional contrictions | Dieter Freitag, Claus Wulff, Hermann Kauth | 1994-05-31 |
| 5314985 | Molten, catalytic process for the preparation of polycarbonates | Steffen Kuhling, Hermann Kauth, Dieter Freitag | 1994-05-24 |
| 5306805 | Process for the preparation of polyarylene sulphides | Wolfgang Arlt, Karl-Heinrich Meyer, Manfred Schmidt, Erhard Tresper, Wolfgang Eisermann | 1994-04-26 |
| 5247063 | Process for the purification of polyarylene sulphides | Franz Alfes, Wolfgang Eisermann, Erhard Tresper | 1993-09-21 |
| 5235026 | Continuous production of polycarbonates | Claus Wulff, Hermann Kauth, Gunther Weymans, Zoltan Kricsfalussy, Jürgen Heuser | 1993-08-10 |
| 5191001 | Process for the production of solventless polycarbonate | Steffen Kuhlig, Ralf Pakull, Ulrich Grigo, Peter Tacke, Dieter Freitag | 1993-03-02 |
| 5066776 | Process for the manufacture of polyarylene sulphides | Wolfgang Russeler, Karsten-Josef Idel, Ernst-Ulrich Dorf, Dieter Freitag | 1991-11-19 |
| 5037952 | Process for the production of high molecular weight, optionally branched polyarylene sulfides | Manfred Schmidt, Erhard Tresper, Ernst-Ulrich Dorf, Wolfgang Russeler | 1991-08-06 |
| 5030703 | Liquid crystal polycondensates with improved heat stability, a process for their preparation and their use for the production of shaped articles, films, fibres and filaments | Harald Pielartzik, Rolf-Volker Meyer | 1991-07-09 |
| 4966958 | Process for the preparation of aromatic polyesters | Peter Tacke, Ludwig Bottenbruch, Hans-Josef Buysch, Ulrich Grigo | 1990-10-30 |
| 4920201 | Isolation of purified solid polyarylene sulfide directly from polymerization solution | Wolfgang Jakob, Erhard Tresper | 1990-04-24 |
| 4895930 | Process for isolating polyarylene sulphides | Franz Alfes, Wolfgang Eisermann, Erhard Tresper | 1990-01-23 |
| 4873326 | Process for the preparation of N-alkylated caprolactams | Wolfgang Jakob, Erhard Tresper | 1989-10-10 |