Issued Patents All Time
Showing 1–8 of 8 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, Klaus-Christian Paetz | 2005-05-03 |
| 6787666 | Process for the preparation of isolated 3,4-diaminobenzenesulphonic acid | Gunter Rauchschwalbe, Herbert Emde | 2004-09-07 |
| 5756831 | Process for the preparation of 5-fluoro-2-nitrobenzoic acid | Jurgen Kuprat, Herbert Emde, Klaus-Christian Paetz | 1998-05-26 |
| 5741936 | Process for the preparation of 3-chloro-3'-Nitro-4'-Methoxybenzophenone | Klaus-Christian Paetz, Helmut Fiege | 1998-04-21 |
| 5567854 | Process for separating mixtures of nitrobenzaldehyde isomers | Herbert Emde, Achim Fessenbecker | 1996-10-22 |
| 5475163 | Process for the preparation of 2,3-dichloro-nitrobenzene | Karl H. Neumann, Helmut Fiege | 1995-12-12 |
| 5145958 | Process for the preparation of 2,4- or 2,6-dihalogeno-aniline | Helmut Fiege | 1992-09-08 |
| 4820871 | Process for the preparation of N,N-diaryl-ureas | Joachim Franke, Helmut Fiege, Karlfried Wedemeyer | 1989-04-11 |