Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6888005 | 2-phenylbenzimidazole-5-sulphonic acid from isolated 3,4-diaminobenzenesulphonic acid and use thereof in cosmetic preparations | Gunter Rauchschwalbe, Herbert Emde, Wolfram Kissener | 2005-05-03 |
| 6433228 | Process for preparing 2-halogenated indan-1-ones | Joachim Komoschinski, Helmut Fiege, Guido Steffan | 2002-08-13 |
| 5977362 | Process for the preparation of quinazoline-2,4-diones | Nikolaus Muller, Wolfgang Kiel | 1999-11-02 |
| 5801284 | Hydrogenation of halonitroaromatic compounds | Franz-Josef Mais, Helmut Fiege, Heinz U. Blank, Dieter Brueck, Wolf Mehl | 1998-09-01 |
| 5756831 | Process for the preparation of 5-fluoro-2-nitrobenzoic acid | Wolfram Kissener, Jurgen Kuprat, Herbert Emde | 1998-05-26 |
| 5741936 | Process for the preparation of 3-chloro-3'-Nitro-4'-Methoxybenzophenone | Helmut Fiege, Wolfram Kissener | 1998-04-21 |
| 5384059 | Heat transfer fluid and process for its preparation | Alfons Klein, Rudolf Kron, Helmut Fiege | 1995-01-24 |
| 5021542 | Polycarbonate of polysubstituted cyclohexylidene bisphenols | Volker Serini, Dieter Freitag, Karsten-Josef Idel, Uwe Westeppe, Ulrich Grigo | 1991-06-04 |
| 5010162 | Polycarbonate of alkyl cyclohexylidene bisphenol | Volker Serini, Dieter Freitag, Uwe Westeppe, Karsten-Josef Idel, Ulrich Grigo +2 more | 1991-04-23 |
| 5010163 | Polycarbonate of cycloalkylidene bisphenol | Volker Serini, Dieter Freitag, Uwe Westeppe, Karsten-Josef Idel, Ulrich Grigo +2 more | 1991-04-23 |
| 4701515 | Thermotropic aromatic polyester from 3,3'-diphenyl-4,4'-dihydroxy biphenyl and arylene dicarboxylic acid | Hans-Rudolf Dicke, Ludwig Bottenbruch, Karlfried Wedemeyer, Aziz El Sayed | 1987-10-20 |
| 4667011 | Thermotropic aromatic polyesters having high mechanical properties and good processability, a process for their preparation, and their use for the production of mouldings, filaments, fibres and films | Volker Eckhardt, Hans-Rudolf Dicke, Aziz El Sayed | 1987-05-19 |