Patent US2647830A successfully refreshed from Google Patents.
US2647830A
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US
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Preparation of pure copper metal from copper-bearing scrap
Assignee: Chemical Construction Corp
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Filing: 1949-12-17
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Granted: 1953-08-04
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Expires: 1969-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis N Allen
- 👤 Patrick J Mcgauley
- 👤 Edward S Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:44
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; C22B15/0084; C22B15/0089; C22B15/0093; C22B15/0065; C22B15/0078; C22B7/00; C22B7/006; C22B7/008; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
IN RECOVERING COPPER FROM COPPER-BEARING MATERIAL BY LEACHING SAID MATERIAL WITH AN AQUEOUS AMMONIACAL COPPER SALT SOLUTION AND CHEMICALLY PRECIPITATING COPPER FROM THE LEACH LIQUOR, THE IMPROVEMENT WHICH COMPRISES PREPARING AN AMMONIACAL COPPER SALT SOLUTION INITIALLY CONTAINING AT LEAST 20, BUT NOT MORE THAN ABOUT 110 GRAMS OF CUPRIC COPPER PER LITER, AND CONTACTING THE SOLUTION THUS PREPARED WITH COPPER-BEARING MATERIAL AT A VELOCITY OF ABOUT 0.01-5.0 FEET PER SECOND OVER THE SURFACE.
Claim 2
Dependent Claim
73 words
IN RECOVERING COPPER FROM COPPER-BEARING MATERIAL BY LEACHING SAID MATERIAL WITH AN AQUEOUS AMMONIACAL COPPER SALT SOLUTION AND CHEMICALLY PRECIPITATING COPPER FROM THE LEACH LIQUOR, THE IMPROVEMENT WHICH COMPRISES PREPARING AN AMMONIACAL COPPER SALT SOLUTION INITIALLY CONTAINING AT LEAST 20, BUT NOT MORE THAN ABOUT 110 GRAMS OF CUPRIC COPPER PER LITER, AND CONTACTING THE SOLUTION THUS PREPARED WITH COPPER-BEARING MATERIAL AT A VELOCITY OF ABOUT 0.01-5.0 FEET PER SECOND OVER THE SURFACE.
Claim 3
Dependent Claim
30 words
A PROCESS ACCORDING TO CLAIM 1, IN WHICH THE LEACH LIQUOR IS CONTACTED WITH THE COPPER-BEARING MATERIAL AT A VELOCITY OF FROM ABOUT 0.1-1.0 FOOT PER SECOND OVER THE SURFACE.
References Cited (Backward Citations)
US1131986A
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US1461918A
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US1516356A
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US1570858A
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US1686391A
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US2290313A
Cited
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 |