Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6552230 | Method for preparing 2-nitro-5-(phenylthio)-anilines | Willi Streicher, Friedrich-Wilhelm Ullrich | 2003-04-22 |
| 5717127 | Process for preparing 6-oxo-(6H)-dibenz-C,E! 1,2!-oxaphosphorins | Hans-Josef Buysch | 1998-02-10 |
| 5675032 | Process for the preparation of specific polyethylene glycol di (2-(4-chloro-2-methylphenoxy)-propionic acid ester mixtures | Lutz Heuer, Heinz-Joachim Rother | 1997-10-07 |
| 5650530 | Process for preparing 6-oxo-(6H)-dibenz-[c,e][1,2]-oxaphosphorins (ODOPs) | Hans-Josef Buysch, Bernd Griehsel, Joachim Komoschinski | 1997-07-22 |
| 5593936 | Hydrated niobium oxide and hydrated tantalum oxide catalysts, their preparation and a process for preparing N-alkylated anilines using these catalysts | Ursula Pentling, Bernd Pennemann, Joerg-Dietrich Jentsch, Eberhard Zirngiebl, Horst Koller | 1997-01-14 |
| 4837301 | Process for the preparation of high molecular weight optionally branched polyarylenesulphides | Wolfgang Ebert, Rolf-Volker Meyer | 1989-06-06 |