Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7368061 | Process and device for the production of elastomer-modified thermoplastics | Haakan Jonsson, Ulrich Liesenfelder, Stefan Moss, Ricarda Nothelle, Andreas Frankenau +1 more | 2008-05-06 |
| 7153929 | Copolymers, devoid of rubber, with low residual monomer content and a method and device for producing the same | Klemens Kohlgrüber, Frank Weyrich, Peter Rudolph, Hans-Jürgen Thiem, Michael König +2 more | 2006-12-26 |
| 7041781 | Thermoplastic molding compounds with improved surface properties and improved structural homogeneity | Michael König, Dorothy Rose, Hans-Bernhard Hauertmann, Heinrich Alberts, Dieter Wittmann | 2006-05-09 |
| 6797784 | Thermoplastic resins with a low proportion of coarse particles | Michael Zobel, Dieter Wittmann, Herbert Eichenauer, Thomas Eckel, Bernd Keller +2 more | 2004-09-28 |
| 6689464 | Method and device for producing bisphenol a prills and bisphenol a prills produced according to this method | Rolf Lanze, Rainer Neumann, Steffen Kuhling, Frieder Heydenreich, Tony van Osselaer +2 more | 2004-02-10 |
| 6486363 | Process for the manufacture of bis(4-hydroxyaryl)alkanes | Klaus Berg, Hans-Josef Buysch, Gerhard Fennhoff, Georg Malamet, Clauss Wulff | 2002-11-26 |
| 5785823 | Process for the purification of bisphenol | Kurt P. Meurer, Tony Osselaer, Werner Verhoeven, Johan Vaes, Ignace Hooftman +4 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 |
| 5698600 | Process for the production of bisphenols with the use of new cocatalysts | Claus Wulff, Gerhard Fennhoff | 1997-12-16 |
| 5545764 | Process for the continuous production of high purity bisphenol A | Klaus Berg, Claus Wulff, Georg Malamet, Kurt P. Meurer, Tony van Osselaer +1 more | 1996-08-13 |
| 5455282 | Process of regenerating sulfonic acid cation exchange resins with a mercaptoethylamine or thiazolidine | Klaus Berg, Georg Malamet, Franz Backes, Claus Wulff | 1995-10-03 |
| 5395857 | Optimized ion exchanger beds for the synthesis of bisphenol A | Klaus Berg, Georg Malamet, Claus Wulff | 1995-03-07 |
| 5302774 | Process for the production of bisphenols | Klaus Berg, Hans-Josef Buysch, Gerhard Fennhoff, Otto Immel, Ralf Pakull +2 more | 1994-04-12 |
| 5300700 | Process for the production of high-purity bisphenol A | Georg Malamet, Hans-Peter Wirges, Claus Wulff | 1994-04-05 |
| 5210328 | Process for the preparation of substituted cycloalkylidene bisphenols | Dieter Freitag, Claus Wulff, Helmut Waldmann, Uwe Westeppe, Manfred Hajek +3 more | 1993-05-11 |
| 4342847 | Process for the production of thermoplastic synthetic materials | Wilhelm Goyert, Ernst Meisert, Wolfgang Grimm, Hans Wagner, Georg Niederdellmann +1 more | 1982-08-03 |
| 4261946 | Process for the production of thermoplastic polymer by introducing thermoplastic polymer into an extruder and adding organic polyisocyanate and chain lengthening agent | Wilhelm Goyert, Ernst Meisert, Wolfgang Grimm, Hans Wagner, Georg Niederdellmann +1 more | 1981-04-14 |
| 4250292 | Process for the preparation of polyurethane elastomers in which at least two reactant portions are introduced into separate positions of a screw machine | Georg Niederdellmann, Wilhelm Goyert, Ernst Meisert, Hans Wagner, Hans Hespe | 1981-02-10 |