Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8686197 | Method for improving the color number of trimethylolpropane | Hans-Dieter Gerriets, Michael Friederich | 2014-04-01 |
| 8642816 | Method for isolating di-trimethylol propane | Gunter Rauchschwalbe, Michael Friederich, Hans-Dieter Gerriets, Carsten Hummelt, Christiane Oppenheimer-Stix +1 more | 2014-02-04 |
| 8530676 | Process for producing vinylene carbonate | Reinhard Langer, Anke Beckmann, Paul Wagner, Heinrich Grzinia, Marielouise Schneider +2 more | 2013-09-10 |
| 8003830 | Method for improving the color number of trimethylolpropane | Wolfgang Mägerlein, Michael Friederich, Hans-Dieter Gerriets, Heinrich Grizinia, Paul Wagner | 2011-08-23 |
| 7683217 | Process for preparing monomethylhydrazine | Uwe Boger, Mathias Siekmann | 2010-03-23 |
| 7211701 | Preparation of trimethylolpropane | Dirk Müller, Paul Wagner, Brian Schwegler, Ralph Armbrust, Hans-Detlef Heinz +1 more | 2007-05-01 |
| 6933409 | Amination of aromatic hydrocarbons and heterocyclic analogs thereof | Damodara M. Poojary, Ramesh B. Borade, Alfred Hagemeyer, Xiao Ping Zhou, Christopher E. Dube +3 more | 2005-08-23 |
| 6291392 | Catalysts containing a platinum group metal and produced in a sol-gel method, as well as a method for producing diarylcarbonates | Carsten Hesse, Johann Rechner | 2001-09-18 |
| 6242632 | Supported catalysts containing a platinum group metal and method for producing diarylcarbonates | Carsten Hesse, Johann Rechner | 2001-06-05 |
| 5932768 | Process for the preparation of 4-aminodiphenylamine | Pieter Ooms, Christian Laue | 1999-08-03 |
| 5925791 | Process for producing 4-aminodiphenylamine | Hans-Josef Buysch, Christian Laue, Heinrich Konigshofen, Pieter Ooms, Ursula Pentling | 1999-07-20 |
| 5856516 | Process for the preparation of carbazole | Hans-Josef Buysch, Reinhard Langer, Alexander Klausener | 1999-01-05 |
| 5763717 | Process for preparing hydroxybiphenyl | Hans-Josef Buysch, Christine Mendoza-Frohn, Jurgen Scharschmidt, Rudolf J. Klee, Gerhard Darsow | 1998-06-09 |
| 5625097 | Process for preparing diphenylamines and catalysts usable for this purpose | Hans-Josef Buysch, Christine Mendoza-Frohn, J urgen Scharschmidt, Rudolf J. Klee, Gerhard Darsow | 1997-04-29 |