Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7002023 | Method for producing 1 substituted 5-chloro-4 methly pyrazoles | Erich Fretschner | 2006-02-21 |
| 6867326 | Method of producing glyphosate or a salt thereof | Ulrich Müller | 2005-03-15 |
| 6538135 | Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6) | Klaus Herbig, Erich Fretschner, Helmut Fröhlich | 2003-03-25 |
| 6515139 | Method for producing N-substituted 2-pyrazoline-5-one | Erich Fretschner, Knut Koob | 2003-02-04 |
| 6252069 | Method for the production of 3-isopropyl-1H-2, 1,3-benzothiadiazine-4 (3H)-one-2,2-dioxide | Otto Worz, Erich Fretschner, Hanspeter Hansen, Albrecht Muller, Kurt Benz | 2001-06-26 |
| 6229022 | Method for producing substituted pyrazoles | Erich Fretschner | 2001-05-08 |
| 6066761 | Method for isolating 3-[2-chloro-4-(trifluoromethyl)-phenoxy]-benzoic acid | Ronald R. Eva, Dirk Franke, Simon Jones, Wolfgang Mattmann, Manfred Munzinger | 2000-05-23 |
| 5939584 | Process for preparing solid, free-flowing water-soluble salts of aryloxy-C.sub.1 -C.sub.4 -alkanecarboxylic acids | Karl Brenner, Erich Fretschner, Michael Schönherr, Anne van Gastel | 1999-08-17 |
| 5847154 | Method of preparing 1,2-dimethyl-3,5-diarylpyrazolium methylsulfates | Erich Fretschner | 1998-12-08 |
| 5840913 | Process for preparing N-substituted pyrazoles | Erich Fretschner, Jürgen Schröder | 1998-11-24 |
| 5795983 | Preparation of ammonium salts of 3-isopropyl-2, 1, 3-benzothia-diazin-4-one 2,2-dioxide | Alfons Durein, Hanspeter Hansen, Karl-Friedrich Jager | 1998-08-18 |
| 5763659 | Preparation of optically active 2-halopropionic acids | Erich Fretschner, Hanspeter Hansen, Bernhard Zipperer | 1998-06-09 |
| 5744614 | Preparation of 3,5-diarylpyrazoles | Erich Fretschner | 1998-04-28 |
| 5569769 | Preparation of pyrazole and its derivatives | Erich Fretschner | 1996-10-29 |
| 5468871 | Preparation of N-substituted pyrazoles | Klaus Ebel, Juergen Schroeder, Carsten Groening, Toni Dockner | 1995-11-21 |
| 5436335 | Preparation of 2,6-dimethylmorpholine from N-(2-hydroxypropyl)-2,6-dimethylmorpholine | Rolf Pinkos, Rolf Fischer | 1995-07-25 |
| 5391734 | Preparation of N-(2-hydroxypropyl)-2,6-dimethylmorpholine | Rolf Pinkos, Rolf Fischer | 1995-02-21 |
| 5128480 | Preparation of 3-methylpyrazole | Erich Fretschner | 1992-07-07 |
| 4996327 | Preparation of pyrazole and its derivatives | Erich Fretschner | 1991-02-26 |
| 4868308 | Preparation of N-phenyl(pyridyl) sulfonyldiamides | Albrecht Mueller, Gerhard Hamprecht, Gernot Reissenweber | 1989-09-19 |
| 4746443 | Bentazon containing wastewater treatment | Mao-Yao Huang, Joseph F. Louvar, Albrecht Muller, Hanspeter Hansen | 1988-05-24 |
| 4451378 | Isolation of 3-isopropyl-2,1,3-benzothiadiazin-4-one-2,2-dioxide from waste water from its preparation | Hanspeter Hansen, Albrecht Mueller | 1984-05-29 |
| 4207243 | Preparation of 2,5-dimethylfuran-3-carboxylic acid alkyl esters | Friedrich Linhart, Bjoern Girgensohn, Hardo Siegel, Hans Mueller | 1980-06-10 |