Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7732559 | Method of making halophthalic acids and halophthalic anhydrides | Robert Edgar Colborn, David Bruce Hall, Bernd Volker Demuth, Thomas Wessel, Karl E. Mack +5 more | 2010-06-08 |
| 7541489 | Method of making halophthalic acids and halophthalic anhydrides | Robert Edgar Colborn, David Bruce Hall, Bernd Volker Demuth, Thomas Wessel, KarlErnst Mack +5 more | 2009-06-02 |
| 6657067 | Method for the manufacture of chlorophthalic anhydride | Robert Edgar Colborn, David Bruce Hall, Gerald Oeckel | 2003-12-02 |
| 6657068 | Liquid phase oxidation of halogenated ortho-xylenes | Robert Edgar Colborn, David Bruce Hall, Gerald Oeckel | 2003-12-02 |
| 6649773 | Method for the manufacture of halophthalic acids and anhydrides | Robert Edgar Colborn, David Bruce Hall, Gerald Oeckel | 2003-11-18 |
| 6392051 | Process for preparing 4-(4′-carboxyphenyl)pyridine | Andreas Meudt, Stefan Scherer, Gerhard Demmer, Frank Vollmuller | 2002-05-21 |
| 5886218 | Process for preparing 4, 5-dichloro-2-methylbenzoic acid | Thomas Wessel | 1999-03-23 |
| 5767292 | Processes for preparing 1-methoxy-2-propyl 3-(7-diethylamino-2-oxo-2H-chromen-3-yl)-3-oxopropionate | Wolfgang Bauer | 1998-06-16 |
| 5705674 | Process for preparing ortho-nitrobenzonitriles | Thomas Wessel | 1998-01-06 |
| 5414128 | Process for the preparation of N-substituted nitro-p-phenylenediamines | Willi Steckelberg, Rolf Muller | 1995-05-09 |
| 5393894 | Process for the preparation of N-ethylcarbazole | Johannes Becherer | 1995-02-28 |
| 5387716 | N4-substituted 1-alkoxy-2-acylamino-4-aminobenzenes, process for their preparation and their use | Willi Steckelberg | 1995-02-07 |
| 5244671 | Derivatives of porphycene for photodynamic therapy of cancer | Emanuel Vogel, Afssaneh Rahbar, Alexander D. Cross | 1993-09-14 |