Issued Patents All Time
Showing 1–25 of 81 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6500988 | Method for producing aryl thiols by hydrogenating diaryldisulphides | Friedrich-Wilhelm Ullrich | 2002-12-31 |
| 6433228 | Process for preparing 2-halogenated indan-1-ones | Joachim Komoschinski, Guido Steffan, Klaus-Christian Paetz | 2002-08-13 |
| 6355827 | Process for preparing 2-cyanoindan-1-ones | Joachim Komoschinski, Guido Steffan | 2002-03-12 |
| 6271415 | S-(4-biphenyl)-thiosulphuric acids and their salts, method for producing the same and method for producing 4-mercaptobiphenyls | Friedrich-Wilhelm Ullrich, Wolfgang Eymann | 2001-08-07 |
| 6133480 | Preparation of N-phenyl-1-naphthylamine | Horst Behre, Wolfgang Eymann, Frank Arndt, Rudolf Wiemers, Alexander Klausener | 2000-10-17 |
| 6093852 | Process for preparing 4,6-diamino-resorcinol dihydrochloride | Horst Behre, Heinz U. Blank, Wolfgang Eymann | 2000-07-25 |
| 6002041 | Process for preparing di-C.sub.1 - C.sub.4 -alkyl 5-nitro-isophthalates | Gunter Rauchschwalbe, Bernhard Beitzke | 1999-12-14 |
| 5998628 | Non-explosive preparations of 1-hydroxybenzotriazole | Ferdinand Hagedorn | 1999-12-07 |
| 5922874 | Process for preparing N-aryl-N'-alkyl-piperazines | Joachim Komoschinski, Bernhard Beitzke | 1999-07-13 |
| 5911962 | Process for the purification of phosphorus oxychloride | Franz-Josef Mais | 1999-06-15 |
| 5872300 | Process for the preparation of 2-amino-6-chlorophenyl-alkylsulfanes, and 2-amino-6-chlorophenyl-isopropylsulfane | Ferdinand Hagedorn, Wolfgang Kiel | 1999-02-16 |
| 5872283 | Process for decarboxylation of halogenated aromatic carboxylic acids | Stefan Antons, Guido Steffan | 1999-02-16 |
| 5869735 | Process for the preparation of alkyl aryl ethers containing carboxyl groups | Stefan Antons, Erich Hammerschmidt, Heinz U. Blank, Heinz-Gerd Hartges | 1999-02-09 |
| 5859296 | Process for isolating hydroxypivalic acid from aqueous solution | Karl H. Neumann, Dieter Heitkamp | 1999-01-12 |
| 5847236 | Process for the preparation of 2-chloro-4-methylphenol | Franz-Josef Mais | 1998-12-08 |
| 5847234 | Process for the preparation of 4-hydroxybiphenyl | Horst Behre, Gunter Rauchschwalbe | 1998-12-08 |
| 5808141 | Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid | Albert Schnatterer | 1998-09-15 |
| 5801284 | Hydrogenation of halonitroaromatic compounds | Franz-Josef Mais, Klaus-Christian Paetz, Heinz U. Blank, Dieter Brueck, Wolf Mehl | 1998-09-01 |
| 5801276 | Process for the preparation of hydroxypivalic acid | Karl H. Neumann, Winfried Joentgen, Dieter Heitkamp | 1998-09-01 |
| 5780638 | Process for the preparation of 5-hydroxymethylthiazole | Helmut Kraus | 1998-07-14 |
| 5773664 | Process for the recovery of 4-hydroxybenzaldehyde from reaction mixtures containing same | Albert Schnatterer, Frank Jelitto, Peter Skornia, Karl-Heinz Theisen | 1998-06-30 |
| 5760247 | Process for the preparation of carbazole | Albert Schnatterer, Joerg-Dietrich Jentsch, Eberhard Zirngiebl | 1998-06-02 |
| 5756809 | "Process for the preparation of (2RS,3RS)-3-(2'-aminophenylthio)-2-hydroxy-3-(4""-methoxyphenyl)-propioni c acid methyl ester" | Ferdinand Hagedorn | 1998-05-26 |
| 5741936 | Process for the preparation of 3-chloro-3'-Nitro-4'-Methoxybenzophenone | Klaus-Christian Paetz, Wolfram Kissener | 1998-04-21 |
| 5684217 | Process for preparing 3-fluoro-4,6-dichlorotoluene | Franz-Josef Mais, Werner Bussmann | 1997-11-04 |