Patent US2563623A successfully refreshed from Google Patents.
US2563623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
scott
Assignee: —
•
Filing: —
•
Granted: 1951-08-07
•
Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:06
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
THE CYCLIC METHOD OF LEACHING SULPHIDIC COPPER ORE IN PLACE WHICH COMPRISES DELIVERING A DILUTE AQUEOUS SOLUTION OF SULPHURIC ACID AND FERRIC SULPHATE TO THE ORE, COLLECTING THE SOLUTION AFTER IT HAS PASSED THROUGH THE ORE, SEPARATING COPPER FROM THE COLLECTED SOLUTION, THEREAFTER OXIDIZING THE FERROUS IRON IN THE SOLUTION TO THE FERRIC FORM, AND THEN RE-DELIVERING THE SOLUTION TO THE ORE, CHARACTERIZED IN THAT THE TOTAL AMOUNT OF IRON IN THE SOLUTION IS REDUCED TO LESS THAN 10 GRAMS PER LITER PRIOR TO RE-DELIVERY OF THE SOLUTION TO THE ORE, AND FURTHER CHARACTERIZED IN THAT SULPHURIC ACID IS ADDED TO THE SOLUTION PRIOR TO ITS RE-DELIVERY TO THE ORE IN AN AMOUNT SUFFICIENT TO IMPART TO THE SOLUTION WHEN COLLECTED AFTER PASSING THROUGH THE ORE A PH NOT GREATER THAN ABOUT 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |