US3154411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the precipitation of copper from dilute acid solutions
Assignee: Kennecott Corp
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Filing: 1962-03-20
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Granted: 1964-10-27
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Expires: 1982-03-20
Abstract
No abstract record available.
Inventors
- 👤 Alexander E Back
- 👤 Kenneth E Fisher
- 👤 Kocherhans John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:11
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS OF PRECIPITATING COPPER FROM DILUTE ACID SOLUTIONS THEREOF, COMPRISING PASSING SUCH A DILUTE ACID SOLUTION UPWARDLY THROUGH AND BEYOND A MASS OF FINELY DIVIDED METALLIC IRON, THE SOLUTION BEING PASSED THROUGH THE MASS AT A VELOCITY EFFECTIVE TO DYNAMICALLY SUSPEND THE INDIVIDUAL PARTICLES AND TO BRING ABOUT INTIMATE LIQUIDSOLIDS CONTACT AND REPLACEMENT OF MOST OF THE IRON BY COPPER, ACCOMPANIED BY EVOLUTION OF GAS; REDUCING THE FLOW VELOCITY OF SAID SOLUTION AS IT RISES, TO ESTABLISH A RELATIVELY QUIESCENT STRATUM OF FINER PARTICLES ABOVE A TURBULENT ZONE OF LIQUID-SOLIDS INTERACTION;
Claim 2
Dependent Claim
92 words
A PROCESS OF PRECIPITATING COPPER FROM DILUTE ACID SOLUTIONS THEREOF, COMPRISING PASSING SUCH A DILUTE ACID SOLUTION UPWARDLY THROUGH AND BEYOND A MASS OF FINELY DIVIDED METALLIC IRON, THE SOLUTION BEING PASSED THROUGH THE MASS AT A VELOCITY EFFECTIVE TO DYNAMICALLY SUSPEND THE INDIVIDUAL PARTICLES AND TO BRING ABOUT INTIMATE LIQUIDSOLIDS CONTACT AND REPLACEMENT OF MOST OF THE IRON BY COPPER, ACCOMPANIED BY EVOLUTION OF GAS; REDUCING THE FLOW VELOCITY OF SAID SOLUTION AS IT RISES, TO ESTABLISH A RELATIVELY QUIESCENT STRATUM OF FINER PARTICLES ABOVE A TURBULENT ZONE OF LIQUID-SOLIDS INTERACTION;
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |