Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6140382 | Process for the preparation of isocyanates or isocyanate mixtures useful for the preparation of polyurethane foams | Manfred Gallus, Herbert Gebauer | 2000-10-31 |
| 6111140 | Ru--Pd halogen-free catalyzers and method for producing cycloaliphatic amines | Hans-Josef Buysch, Gerhard Darsow, Reinhard Langer | 2000-08-29 |
| 5985227 | Process for removing sulfur compounds from industrial gases | Harald Muller | 1999-11-16 |
| 5763350 | Catalysts for removing sulfur compounds from industrial gases, a process for their production and their use | Harald Muller | 1998-06-09 |
| 5583251 | Process for the production of isocyanates and for the production of light-colored foams therefrom | Hans-Josef Buysch, Manfred Gallus, Herbert Gebauer, Christine Mendoza-Frohn, Reinhard Langer | 1996-12-10 |
| 5552362 | Catalysts for the removal of sulfur compounds from industrial gases, a process for their production and their use | Harald M uller | 1996-09-03 |
| 5434310 | Process for the preparation of acylbenzenes | Helmut Waldmann, Manfred Hajek, Lothar Puppe, Rudolf Braden | 1995-07-18 |
| 5386060 | Palladium catalyst and its use in the preparation of a mixture of optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine | Gerhard Darsow, Helmut Waldmann, Gerd-Michael Petruck | 1995-01-31 |
| 5371294 | Process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine | Hans-Josef Buysch, Gerhard Darsow | 1994-12-06 |
| 5344987 | Process for preparing diphenylamines | Gerhard Darsow, Hans-Josef Buysch | 1994-09-06 |
| 5338861 | Process for the preparation of N-substituted lactams | Artur Botta, Hans-Josef Buysch, Lothar Puppe | 1994-08-16 |
| 5338885 | Process for the preparation of diphenylamines | Gerhard Darsow, Hans-Josef Buysch | 1994-08-16 |
| 5322965 | Process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine using a supported noble metal catalyst | Gerhard Darsow, Helmut Waldmann, Gerd-Michael Petruck | 1994-06-21 |
| 5304525 | Catalyst for the preparation of aniline | Helmut Waldmann, Rudolf Braden, Christian Frohlich, Gerhard Friedhofen, Wilfried Niemeier | 1994-04-19 |
| 5302774 | Process for the production of bisphenols | Klaus Berg, Hans-Josef Buysch, Alfred Eitel, Gerhard Fennhoff, Ralf Pakull +2 more | 1994-04-12 |
| 5300706 | Process for the preparation of d,1-menthol | Gerhard Darsow, Hans-Josef Buysch | 1994-04-05 |
| 5268509 | Process for the preparation of an iron catalyst and a process for the preparation of primary amines by the hydrogenation of nitriles using said iron catalyst | Dietrich Liebsch, Hans-Helmut Schwarz, Stephan Herman Wendel, Peter Fischer | 1993-12-07 |
| 5248840 | Process for the preparation of hydrooxydiphenyls | Gerhard Darsow, Udo Birkenstock | 1993-09-28 |
| 5245082 | Process for the production of di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer | Gerhard Darsow, Rudolf Braden, Hans-Helmut Schwarz, Helmut Waldmann | 1993-09-14 |
| 5196592 | Process for the preparation of diphenylamines | Helmut Waldmann, Reinhard Langer, Gerhard Darsow, Hans-Josef Buysch | 1993-03-23 |
| 5174985 | Process for the oxidation of water-insoluble organic compounds | Hans-Helmut Schwarz, Friedhelm Sahlmen, Hanno Henkel | 1992-12-29 |
| 5166440 | Process for the preparation of n-alkylated aromatic amines | Helmut Waldmann, Rudolf Braden | 1992-11-24 |
| 5097071 | Supported copper catalyst, process for its preparation and process for the preparation of N-alkylated aromatic amines using this copper catalyst | Hans-Helmut Schwarz, Rudolf Braden | 1992-03-17 |
| 5023226 | Ruthenium supported catalyst, its preparation and its use in the preparation of substituted or unsubstituted cyclohexylamine and substituted or unsubstituted dicyclohexylamine | Hans-Helmut Schwarz, Reinhard Thiel | 1991-06-11 |
| 4952549 | Ruthenium catalyst, process for its preparation and process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine using the ruthenium catalyst | Hans-Helmut Schwarz | 1990-08-28 |