Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5682593 | Extraction of acids and metal salts from aqueous solutions with diethyl dodecylphosphonate | Hans-Dieter Block, Hans-Heinrich Moretto | 1997-10-28 |
| 5641888 | Synthesis of an O,O' -diesters of thiophosphoric acid, an O-ester of thiophosphonic acid, or a thiophosphinic acid | Ottfried Schlak, Rosemarie Grizan, Johannes Jezierski | 1997-06-24 |
| 5639909 | Production of 2-phosphonobutane-1,2,4-tricarboxylic acid and the alkali metal salts thereof | Wolfgang Ohlendorf, Hans-Dieter Block, Horst Bertram, Roland Kleinstuck, Hans-Heinrich Moretto | 1997-06-17 |