Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |