Issued Patents All Time
Showing 1–25 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5981644 | Method of producing ABS moulding compositions | Ralph Ostarek, Herbert Eichenauer, Karl-Erwin Piejko, Frank Wingler | 1999-11-09 |
| 5959160 | Purification of p,p-bisphenolate solutions | Kurt P. Meurer, Tony van Osselaer, Roelof Boyens, Jurgen Hinz | 1999-09-28 |
| 5921089 | Method for the transport and storage of phenol | Werner Kleinloh, Otto Schnurr, Tony van Osselaer, Gottfried Zaby | 1999-07-13 |
| 5830977 | Process for the isolation of partially crystalline polycarbonate powder | Gottfried Zaby, Clemens Casper, Klemens Kohlgrüber, Hugo Obermann, Steffen Kuhling | 1998-11-03 |
| 5785823 | Process for the purification of bisphenol | Kurt P. Meurer, Tony Osselaer, Werner Verhoeven, Johan Vaes, Ignace Hooftman +4 more | 1998-07-28 |
| 5786445 | Process for drying polymeric powders and polymeric agglomerates | Gottfried Zaby, Thomas Bamberger, Klemens Kohlgrüber, Hugo Obermann, Stefaan De Vos +3 more | 1998-07-28 |
| 5780690 | Bisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compounds | Klaus Berg, Gerhard Fennhoff, Ralf Pakull, Hans-Josef Buysch, Bernhard Wehrle +2 more | 1998-07-14 |
| 5756860 | Crystalline adduct of bisphenol A and bisphenol TMC | Kurt P. Meurer, Tony van Osselaer, Jurgen Hinz | 1998-05-26 |
| 5726228 | Use of carbonates as demoulding agents for thermoplastic polycarbonates | Ralf Kaufmann, Wolfgang Ebert, Hartmut Lower, Jurgen Kadelka, Gottfried Zaby | 1998-03-10 |
| 5703204 | Method for reprocessing aqueous extract solutions obtained in the production of PA 6 or copolyamide | Andreas Gittinger, Heinrich Haupt, Karsten-Josef Idel | 1997-12-30 |
| 5698600 | Process for the production of bisphenols with the use of new cocatalysts | Gerhard Fennhoff, Alfred Eitel | 1997-12-16 |
| 5696295 | Method for the preparation of ultra-pure bisphenol A and the use thereof | Kaspar Hallenberger, Heinrich Steude, Kurt P. Meurer, Tony van Osselaer, Jurgen Hinz +3 more | 1997-12-09 |
| 5684087 | Process for producing thermoplastic granulated polymer material from polymer solutions | Gottfried Zaby, Clemens Casper, Klemens Kohlgrüber, Thomas Bamberger, Hugo Obermann | 1997-11-04 |
| 5652313 | Two-stage process for the manufacture of thermoplastic polycarbonate | Steffen Kuhling, Uwe Hucks, Gottfried Zaby | 1997-07-29 |
| 5627256 | Polycarbonates containing aryl phosphines | Helmut-Martin Meier, Hartmut L ower, Wolfgang Ebert | 1997-05-06 |
| 5545764 | Process for the continuous production of high purity bisphenol A | Klaus Berg, Georg Malamet, Alfred Eitel, Kurt P. Meurer, Tony van Osselaer +1 more | 1996-08-13 |
| 5456861 | Abietic acid derivatives and their use as emulsifiers | Karl-Erwin Piejko, Dieter Constant, Christian Lindner | 1995-10-10 |
| 5455282 | Process of regenerating sulfonic acid cation exchange resins with a mercaptoethylamine or thiazolidine | Klaus Berg, Georg Malamet, Franz Backes, Alfred Eitel | 1995-10-03 |
| 5412060 | Process for the production of polycarbonate of constant viscosity | Uwe Hucks, Rolf Bachmann, Gunther Weymans, Jurgen Kadelka, Wolfgang Herrig | 1995-05-02 |
| 5395857 | Optimized ion exchanger beds for the synthesis of bisphenol A | Klaus Berg, Georg Malamet, Alfred Eitel | 1995-03-07 |
| RE34626 | Isomerization of bisphenols | Udo Rudolph | 1994-05-31 |
| 5317083 | Process for isolating polycarbonates from their solutions with tube having cross sectional contrictions | Dieter Freitag, Wolfgang Alewelt, Hermann Kauth | 1994-05-31 |
| 5302774 | Process for the production of bisphenols | Klaus Berg, Hans-Josef Buysch, Alfred Eitel, Gerhard Fennhoff, Otto Immel +2 more | 1994-04-12 |
| 5300700 | Process for the production of high-purity bisphenol A | Georg Malamet, Hans-Peter Wirges, Alfred Eitel | 1994-04-05 |
| 5300550 | Thermoplastic molding compositions | Thomas Eckel, Dieter Wittmann, Karl-Heinz Ott, Dieter Freitag | 1994-04-05 |