Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6307111 | Method for continuous production of dihydroxydiarylalkanes | Gerhard Fennhoff, Hans-Josef Buysch | 2001-10-23 |
| 6294702 | Method for continuous production of dihydroxydiphenylalkanes | Gerhard Fennhof, Hans-Josef Buysch, Tony van Osselaer | 2001-09-25 |
| 6211417 | Process for preparing bis-(4-hydroxyaryl) alkanes | Hans-Josef Buysch, Frieder Heydenreich, Rob Eek, Gerhard Fennhoff | 2001-04-03 |
| 6191316 | Method for processing mother liquors from the production of bisphenol | Gerhard Fennhoff, Hans-Josef Buysch | 2001-02-20 |
| 5861107 | Process for the preparation of aliphatic carbonates having a six-membered ring | Hans-Josef Buysch, Karl H. Neumann, Paul Wagner, Martin Melchiors, Wieland Hovestadt | 1999-01-19 |
| 5399600 | Stabilized, flame resistant polycarbonate moulding compounds | Hans-Josef Buysch, Gerhard Fennhoff, Klaus Horn | 1995-03-21 |
| 5310793 | Mixtures of polyalkylene terephthalates, new polycarbonates and/or polyester-carbonates and elastomers | Dieter Freitag, Karsten-Josef Idel, Ulrich Grigo, Jurgen Kirsch, Uwe Westeppe | 1994-05-10 |
| 5276213 | Special dihydroxydiphenyl bicycloalkanes, their production and their use for the production of high molecular weight polycarbonates | Volker Serini, Uwe Westeppe, Manfred Hajek, Carl Casser, Helmut Waldmann | 1994-01-04 |
| 5252674 | Thermoplastic graft polymers containing oxetanyl groups | Karl-Erwin Piejko, Christian Lindner, Hans-Eberhard Braese, Jurgen Kirsch | 1993-10-12 |
| 5252672 | Polymer blends of polyamides and polymers containing sulfonamide structural units | Georg Heger, Holger Lutjens, Christian Lindner | 1993-10-12 |
| 5219934 | Polymers containing sulfonamide units as compatibilizers for polyamide/polycarbonate blends | Georg Heger, Holger Lutjens, Karl-Erwin Piejko, Josef Buekers | 1993-06-15 |
| 5216113 | Highly branched polyphosphonates | Wolfgang Schulz-Schlitte, Jurgen Kirsch, Karsten-Josef Idel, Uwe Arndt, Hans-Dieter Block | 1993-06-01 |
| 5212280 | Polycarbonate from special dihydroxydiphenyl bicycloalkane | Volker Serini, Uwe Westeppe, Manfred Hajek, Carl Casser, Helmut Waldmann | 1993-05-18 |
| 5194497 | Alloys of thermoplastic polymers containing oxetanyl groups | Karl-Erwin Piejko, Holger Lutjens, Hans-Eberhard Braese, Christian Lindner, Jurgen Kirsch | 1993-03-16 |
| 5155168 | Molding compounds containing oxetanyl groups | Holger Lutjens, Dieter Wittmann, Karl-Erwin Piejko, Christian Lindner | 1992-10-13 |
| 5122571 | Moulding compounds of polyamides and graft polymers containing tert.-butylacrylate | Uwe Westeppe, Karl-Erwin Piejko, Rolf Muller, Christian Lindner | 1992-06-16 |
| 5104963 | Two-stage process for the production of polycarbonates based on special dihydroxydiphenylalkanes | Uwe Westeppe, Dieter Freitag, Ulrich Grigo | 1992-04-14 |
| 4861878 | 1H-pyrido-(2,3-b) (1,4)-thiazines | Alexander Klausener, Hans-Josef Buysch, Mithat Mardin, Bernhard Pelster | 1989-08-29 |
| 4784997 | 1-H-pyrido-[3,2-b][1,4]-thiazine | Alexander Klausener, Hans-Josef Buysch, Bernhard Pelster | 1988-11-15 |
| 4548934 | 4H-1,4-Benzothiazine derivatives | Dieter Arlt, Klaus Grohe, Hans-Joachim Zeiler, Karl G. Metzger | 1985-10-22 |
| 4468392 | Sulphinyl- and sulphonyl-azacycloheptan-2-ones, and their use as feed additives | Artur Botta, Martin Scheer, Friedrich Berschauer | 1984-08-28 |
| 4316980 | Process for the preparation of tetramethylated bisphenol polycarbonates | Karsten-Josef Idel, Volker Serini, Dieter Freitag | 1982-02-23 |