Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5682593 | Extraction of acids and metal salts from aqueous solutions with diethyl dodecylphosphonate | Christoph Holzner, Hans-Dieter Block | 1997-10-28 |
| 5667759 | Method for manufacturing alkali chromates from chromium ore | Rainer Bellinghausen, Heinrich Helker, Paul Strehlow, Bernhard Spreckelmeyer, Norbert Lonhoff +5 more | 1997-09-16 |
| 5639909 | Production of 2-phosphonobutane-1,2,4-tricarboxylic acid and the alkali metal salts thereof | Christoph Holzner, Wolfgang Ohlendorf, Hans-Dieter Block, Horst Bertram, Roland Kleinstuck | 1997-06-17 |
| 5618960 | Fine particle silicon containing surface-bound halogen, a process for its production and its use | Manfred Schulze, Hans Rinkes, Elke Licht, Alfred B orsting, Bruno Degen +1 more | 1997-04-08 |
| 5608099 | Process for the recovery of tributyl phosphate from spent hydraulic oils | Hans-G unter Fr ohlen, Hans-Dieter Block, Wolfgang Ohlendorf, Peter C. Schmidt | 1997-03-04 |