US2864692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of copper and cobalt values from sulphate leach solutions
Assignee: Bethlehem Steel Corp
•
Filing: 1956-09-24
•
Granted: 1958-12-16
•
Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Edgar B Mancke
- 👤 Frank M Temmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:36
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415; C22B23/043; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE METHOD OFF TREATING A SULFATE LEACH SOLUTION CONTAINING COPPER AND COBALT VALUES AND SOME IRON IN SOLUTION WHICH COMPRISES AERATING SAID SOLUTION, NEUTRALIZING THE SOLUTION TO A PH RANGING FROM 2.0 TO 2.6, PRECIPITATING COPPER FROM SAID SOLUTION AND SEPARATING PRECIPITATED COPPER VALUES FROM THE SOLUTION, NEUTRALIZING THE SOLUTION TO A PH RANGING FROM 5.2 TO 5.7 AND THEREBY FORM-
Claim 2
Independent Claim
61 words
THE METHOD OFF TREATING A SULFATE LEACH SOLUTION CONTAINING COPPER AND COBALT VALUES AND SOME IRON IN SOLUTION WHICH COMPRISES AERATING SAID SOLUTION, NEUTRALIZING THE SOLUTION TO A PH RANGING FROM 2.0 TO 2.6, PRECIPITATING COPPER FROM SAID SOLUTION AND SEPARATING PRECIPITATED COPPER VALUES FROM THE SOLUTION, NEUTRALIZING THE SOLUTION TO A PH RANGING FROM 5.2 TO 5.7 AND THEREBY FORM-
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) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |