Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7071283 | Reactive rectification | Gerald John, Edmund Dikow, Georg Ronge, Rolf Bachmann, Lutz Gottschalk +1 more | 2006-07-04 |
| 6649798 | Method for production of diaminodiphenylmethanes | Stephan Klein, Dirk Grotjohann, Daniel Koch, Heinz Muller, Hans-Georg Pirkl +2 more | 2003-11-18 |
| 6458972 | Process for the preparation of macrocyclic esters | Horst Surburg, Dirk Müller, Stephan Klein, Georg Ronge, Kai Verkerk | 2002-10-01 |
| 6288284 | Method for producing bis(4-hydroxyaryl)alkanes | Rob Eek, Kaspar Hallenberger, Georg Ronge, Gerhard Fennhoff, Domien Sluyts +1 more | 2001-09-11 |
| 5763717 | Process for preparing hydroxybiphenyl | Hans-Josef Buysch, Jurgen Scharschmidt, Ulrich Notheis, Rudolf J. Klee, Gerhard Darsow | 1998-06-09 |
| 5625097 | Process for preparing diphenylamines and catalysts usable for this purpose | Hans-Josef Buysch, J urgen Scharschmidt, Ulrich Notheis, Rudolf J. Klee, Gerhard Darsow | 1997-04-29 |
| 5583251 | Process for the production of isocyanates and for the production of light-colored foams therefrom | Hans-Josef Buysch, Manfred Gallus, Herbert Gebauer, Otto Immel, Reinhard Langer | 1996-12-10 |
| 5510499 | Process for the isolation of purified ethylene glycol carbonate (EGC) | Paul Wagner, Hans-Peter Wirges | 1996-04-23 |
| 5508442 | Reactor and continuous process to be carried out therewith for the preparation of ethylene glycol carbonate and propylene glycol carbonate | Paul Wagner, Hans-Josef Buysch | 1996-04-16 |
| 5495038 | Process for the purification of diphenyl carbonate | Hans-Josef Buysch, Johann Rechner, Norbert Schon | 1996-02-27 |
| 5489696 | Process for purifying ethylene glycol carbonate (EGC) by adsorption on activated carbon | Paul Wagner, Hans-Josef Buysch | 1996-02-06 |
| 5449791 | Process for the preparation of propylene glycol carbonate | Paul Wagner, Hans-Josef Buysch | 1995-09-12 |
| 5395976 | Process for the preparation of a mixture of cyclohexanone and cyclohexanol | Jurgen Scharschmidt, Hans-Josef Buysch, Rainer Klotzbucher | 1995-03-07 |
| 5391767 | Process for the preparation of alkylene carbonates | Franz-Josef Mais, Hans-Josef Buysch, Alexander Klausener | 1995-02-21 |
| 5350862 | Process for the preparation of ethylene glycol carbonate | Paul Wagner, Hans-Josef Buysch, Alexander Klausener, Franz-Josef Mais | 1994-09-27 |