Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4734172 | Method for selectively recovering lead from complex sulphidic non-ferrous metal concentrates | Lars A. Hedstrom, Kenneth A. S. Sjoberg | 1988-03-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4734172 | Method for selectively recovering lead from complex sulphidic non-ferrous metal concentrates | Lars A. Hedstrom, Kenneth A. S. Sjoberg | 1988-03-29 |