US2647829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decomposition of copper scrap and alloys with copper ammonium carbonate solutions
Assignee: Chemical Construction Corp
•
Filing: 1949-12-17
•
Granted: 1953-08-04
•
Expires: 1969-12-17
Abstract
No abstract record available.
Inventors
- 👤 Patrick J Mcgauley
- 👤 Paul J Masur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:37
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; C22B15/0065; C22B15/0067; C22B15/0078; C22B7/00; C22B7/006; C22B7/008; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN RECOVERING COPPER FROM COPPER-BEARING METALS, THE IMPROVEMENT IN LEACHING WHICH COMPRISES TREATING PIECES OF SAID METALS WITH A STRONG AMMONIACAL-COPPER CARBONATE SOLUTION, SAID TREATING SOLUTION BEING SUBSTANTIALLY SATURATED AS TO COPPER, PRINCIPALLY IN THE CUPRIC CONDITION, AND CONTAINING SUFFICIENT AMMONIA TO KEEP THE COPPER IN SOLUTION; CONTINUING SAID TREATMENT UNTIL SAID PIECES ARE SUBSTANTIALLY CONVERTED TO A SOFT SLUDGE OF SUBSTANTIALLY THE SAME COPPER CONTENT AS SAID PIECES; AND THEN, WITH A DIFFERENT LIQUOR, LEACHING SAID SLUDGE TO SEPARATE COPPER FROM OTHER METALS THEREIN.
Claim 2
Dependent Claim
85 words
IN RECOVERING COPPER FROM COPPER-BEARING METALS, THE IMPROVEMENT IN LEACHING WHICH COMPRISES TREATING PIECES OF SAID METALS WITH A STRONG AMMONIACAL-COPPER CARBONATE SOLUTION, SAID TREATING SOLUTION BEING SUBSTANTIALLY SATURATED AS TO COPPER, PRINCIPALLY IN THE CUPRIC CONDITION, AND CONTAINING SUFFICIENT AMMONIA TO KEEP THE COPPER IN SOLUTION; CONTINUING SAID TREATMENT UNTIL SAID PIECES ARE SUBSTANTIALLY CONVERTED TO A SOFT SLUDGE OF SUBSTANTIALLY THE SAME COPPER CONTENT AS SAID PIECES; AND THEN, WITH A DIFFERENT LIQUOR, LEACHING SAID SLUDGE TO SEPARATE COPPER FROM OTHER METALS THEREIN.
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) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |