Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4568427 | Continuous isolation of phthalic anhydride and maleic anhydride from reaction gases | Eckehard Danz, Gerd Dumbgen, Ernest Miesen, Johannes E. Schmidt | 1986-02-04 |
| 4489775 | Desublimator for isolating sublimation products from reaction gases | Harry Kassat, Joachim Wagner | 1984-12-25 |
| 4411818 | Reactivation of vanadium-containing oxidation catalysts | Peter Reuter, Kurt Blechschmitt | 1983-10-25 |
| 4369327 | Preparation of phthalic anhydride | Dieter Stockburger, Wilhelm Schultz, Johannes E. Schmidt, Herwig Hoffmann, Bernhard Holzknecht +1 more | 1983-01-18 |
| 4324694 | Supported catalysts containing vanadium pentoxide, titanium dioxide, phosphorus, rubidium and/or cesium, with or without zirconium dioxide | Peter Reuter, Kurt Blechschmitt | 1982-04-13 |
| 4282116 | Supported catalyst containing vanadium and titanium and/or zirconium for the preparation of phthalic anhydride | Peter Reuter, Kurt Blechschmitt | 1981-08-04 |