Issued Patents All Time
Showing 1–25 of 90 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6093852 | Process for preparing 4,6-diamino-resorcinol dihydrochloride | Horst Behre, Helmut Fiege, Wolfgang Eymann | 2000-07-25 |
| 5869735 | Process for the preparation of alkyl aryl ethers containing carboxyl groups | Stefan Antons, Erich Hammerschmidt, Helmut Fiege, Heinz-Gerd Hartges | 1999-02-09 |
| 5801284 | Hydrogenation of halonitroaromatic compounds | Franz-Josef Mais, Klaus-Christian Paetz, Helmut Fiege, Dieter Brueck, Wolf Mehl | 1998-09-01 |
| 5714647 | Process for the adiabatic preparation of mononitrohalogenobenzenes | Helmut Judat, Bernd-Michael Konig | 1998-02-03 |
| 5648565 | Process for the adiabatic preparation of mononitrotoluenes | Bernd-Michael Konig, Helmut Judat | 1997-07-15 |
| 5574188 | Process for the preparation of 4,6-diaminoresorcinol | Horst Behre, Helmut Fiege, Uwe Heinz, Wolfgang Eymann | 1996-11-12 |
| 5545754 | Process for the preparation of p-amino-phenols | Alexander Klausener, Heinz Landscheidt | 1996-08-13 |
| 5446192 | Process for the preparation of .beta.- aminoacrylic acid esters | Helmut Kraus, Gerhard Marzolph | 1995-08-29 |
| 5367108 | Process for the preparation of dinitro-polyalkylbenzenes | Bernd-Michael Konig | 1994-11-22 |
| 5326911 | Process for the preparation of ortho-amides | Helmut Kraus, Gerhard Marzolph, Nikolaus Muller | 1994-07-05 |
| 5304680 | Process for the preparation of aromatic amines which are substituted by C.sub.1 -C.sub.4 -alkoxy in the p-position | Heinz Landscheidt, Alexander Klausener | 1994-04-19 |
| 5302742 | Process for the preparation of N-acylated p-amino-phenols | Heinz Landscheidt, Alexander Klausener | 1994-04-12 |
| 5288894 | Process for the preparation of dialkyl carbonates | Heinz Landscheidt, Erich Wolters, Alexander Klausener, Udo Birkenstock | 1994-02-22 |
| 5248812 | Process for the isolation of 2-naphthylamine-1,5-disulphonic acid | Horst Behre, Holger Heidenreich, Fritz Pohl, Paul Uhrhan | 1993-09-28 |
| 5241099 | Process for the preparation of aminomethylene compounds | Helmut Kraus | 1993-08-31 |
| 5235087 | Process for the preparation of dialkyl carbonates | Alexander Klausener, Heinz Landscheidt, Walter Kipshagen | 1993-08-10 |
| 5231213 | Process for the preparation of dialkyl carbonates | Heinz Landscheidt, Alexander Klausener, Erich Wolters, Udo Birkenstock | 1993-07-27 |
| 5206427 | Process for the preparation of aromatic (di)chlorosulphonic acids and (di)bromosulphonic acids | Uwe Heinz | 1993-04-27 |
| 5179211 | Process for the preparation of indoles | Friedrich-Wilhelm Ullrich, Karlheinrich Meisel, Willi Streicher, Nikolaus Schulz, Dieter Irmscher +1 more | 1993-01-12 |
| 5149890 | Process for the isolation of pure dinitrotoluenes | Gunther Rauchschwalbe, Ludwig Deibele, Kaspar Hallenberger, Gerhard Ruffert | 1992-09-22 |
| 5095133 | Process for the preparation of aminomethylene compounds | Helmut Kraus | 1992-03-10 |
| 5082976 | Process for the preparation of benzaldehydes | Helmut Kraus | 1992-01-21 |
| 5081288 | Process for the preparation of substituted 3,5-dichloro-2,4-difluoro-benzenes | Edwin Ritzer | 1992-01-14 |
| 5072053 | 1,3-di-arylmethoxy-4,6-dinitro-benzenes, process for their preparation and process for the preparation of 4,6-diaminoresorcinol | Uwe Heinz | 1991-12-10 |
| 5068428 | Process for the preparation of cyclopropanecarboxamide | Herbert Diehl, Edwin Ritzer | 1991-11-26 |