Patent US2659547A successfully refreshed from Google Patents.
Patent US3586498A successfully refreshed from Google Patents.
US3586498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the selective separation of ferric sulfate from copper in a sulfuric acid leach solution
Assignee: Individual
•
Filing: 1968-01-02
•
Granted: 1971-06-22
•
Expires: 1988-01-02
Abstract
Abstract A PROCESS FOR THE SEPARATION OF FERRIC SULFATE FROM COPPER IN A SULFURIC ACID LEACH SOLUTION, FOLLOWED BY PRECIPITATION OF THE COPPER FROM THE LEACH SOLUTION BY MEANS OF THE ADDITION OF METALLIC IRON. THE PROCESS IS CHARACTERIZED BY THE SELECTIVE SEPARATION OF FERRIC SULFATE FROM COPPER IN THE SULFURIC ACID LEACH SOLUTION, PRIOR TO PRECIPITATION OF THE COPPER, BY THE ADDITION OF A CARBONATE SALT. THE PROCESS MINIMIZES THE METALLIC IRON REQUIREMENT AND IS USEFUL IN THE HYDROMETALLURGICAL RECOVERY OF COPPER FROM COPPER CONTAINING ORES AND MATERIALS.
Inventors
- 👤 John Bryant Kasey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:09
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/44; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |