Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9512298 | Specific mixtures of N,N-bis(2-hydroxyalkyl)-4-toluidine derivatives, their preparation and a method of using such specific mixtures | Wolfgang Scheinert | 2016-12-06 |
| 8642816 | Method for isolating di-trimethylol propane | Ulrich Notheis, Michael Friederich, Hans-Dieter Gerriets, Carsten Hummelt, Christiane Oppenheimer-Stix +1 more | 2014-02-04 |
| 7671217 | Method for the decarboxylation of dicarboxylic acids | Sigurd Buchholz, Alexander Klausener, Reinhard Langer, Leslaw Mleczko | 2010-03-02 |
| 6888005 | 2-phenylbenzimidazole-5-sulphonic acid from isolated 3,4-diaminobenzenesulphonic acid and use thereof in cosmetic preparations | Herbert Emde, Wolfram Kissener, Klaus-Christian Paetz | 2005-05-03 |
| 6825357 | Benzodioxinothiophenes, their preparation and use | Alexander Klausener, Stephan Kirchmeyer, Knud Reuter | 2004-11-30 |
| 6787666 | Process for the preparation of isolated 3,4-diaminobenzenesulphonic acid | Herbert Emde, Wolfram Kissener | 2004-09-07 |
| 6750354 | Process for the alkylation of 3,4-dihydroxythiophene-2,5-dicarboxylic esters | Alexander Klausener, Josef Bremen, Ralf-Ingo Schenkel, Adolf Winkler | 2004-06-15 |
| 6441182 | Method for the production of 2,6-dichloro-5-fluoro-nicotinic acid and coarse and particularly pure 2,6-dichloro-5-fluoro-nicotinic acid | Bernd Griehsel, Andreas Sattler, Karsten von dem Bruch | 2002-08-27 |
| 6403803 | Bis(2-chlorothiazolyl-5-methyl)amine and its salts, and process for working up reaction mixtures comprising 5-aminomethyl-2-chlorothiazole and bis(2-chlorothiazolyl-5-methyl)amine | — | 2002-06-11 |
| 6369239 | Process for the preparation of dialkylthiophenes and alkylenedioxythiophenes | Friedrich Jonas | 2002-04-09 |
| 6002041 | Process for preparing di-C.sub.1 - C.sub.4 -alkyl 5-nitro-isophthalates | Bernhard Beitzke, Helmut Fiege | 1999-12-14 |
| 5847234 | Process for the preparation of 4-hydroxybiphenyl | Horst Behre, Helmut Fiege | 1998-12-08 |
| 5672708 | Process for the preparation of N-arylaminoacrylic acid derivatives and the use of N-arylaminoacrylic acid derivatives thus prepared for the preparation of 4-quinolone-3-carboxylic acid derivatives | Bernhard Beitzke, Wolfgang Eymann, Helmut Fiege | 1997-09-30 |
| 4990686 | Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane | Heinz U. Blank, Volkmar Handschuh | 1991-02-05 |
| 4366102 | Process for the preparation of chloroformic acid aryl esters | Heinz U. Blank, Karl Mannes, Dietmar Mayer | 1982-12-28 |
| 4339396 | Process for the preparation of naphthalenesulphonyl chloride | Karl Mannes, Dietmar Mayer | 1982-07-13 |