Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6045763 | Process for working up ammoniacal metal solutions including treating the wash water with an organic extraction solution | Werner Schwab | 2000-04-04 |
| 5632963 | Process for the removal of impurity elements from solutions of valuable metals | Werner Schwab | 1997-05-27 |
| 5260039 | Process for the two-phase extraction of metal ions from phases containing solid metal oxides, agents and the use thereof | Werner Schwab | 1993-11-09 |
| 5039496 | Process for selective extraction of contaminant elements from mixtures of electrolytes in solution | Werner Schwab, Robert B. Sudderth, Gary A. Korkosky | 1991-08-13 |
| 4834951 | Common separation of contaminating elements from electrolyte solutions of valuable metals | Werner Schwab | 1989-05-30 |
| 4820417 | Use of citric acid partial esters for the extraction of iron | Willi Buchmeier, Werner Schwab | 1989-04-11 |