US2812233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal extraction process
Assignee: Individual
•
Filing: 1955-01-25
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Granted: 1957-11-05
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Expires: 1975-01-25
Abstract
No abstract record available.
Inventors
- 👤 Jr George W Lewis
- 👤 Donald E Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:28
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/0265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE PROCESS OF RECOVERING HEAVY METAL VALUES FROM AN AQUEOUS SOLUTION, COMPRISING DISSOLVING AN ORGANIC, SUBSTANTIALLY WATER-IMMISCIBLE COMPLEXING AGENT IN A MOLTEN WAX WHICH IS SOLID AT ROOM TEMPERATURE, SAID COMPLEXING AGENT HAVING A PHOSPHORUS ATOM AND AN OXYGEN ATOM BONDED DIRECTLY TO THE PHOSPHORUS ATOM AND CAPABLE OF DONATING A PAIR OF ELECTRONS TO FORM A COORDINATION BOND; COOLING THE WAX COMPLEX FORMED; MECHANICALLY DISINTERGRATING THE WAX COMPLEX; CONTACTING THE DISINTEGRATED WAX COMPLEX WITH SAID AQUEOUS SOLUTION WHEREBY SAID METAL VALUES ARE TAKEN UP BY SAID WAX COMPLEX; AND SEPARATING THE METAL-CONTAINING WAX COMPLEX FROM A METAL-DEPLETED AQUEOUS WASTE SOLUTION.
Claim 2
Dependent Claim
101 words
THE PROCESS OF RECOVERING HEAVY METAL VALUES FROM AN AQUEOUS SOLUTION, COMPRISING DISSOLVING AN ORGANIC, SUBSTANTIALLY WATER-IMMISCIBLE COMPLEXING AGENT IN A MOLTEN WAX WHICH IS SOLID AT ROOM TEMPERATURE, SAID COMPLEXING AGENT HAVING A PHOSPHORUS ATOM AND AN OXYGEN ATOM BONDED DIRECTLY TO THE PHOSPHORUS ATOM AND CAPABLE OF DONATING A PAIR OF ELECTRONS TO FORM A COORDINATION BOND; COOLING THE WAX COMPLEX FORMED; MECHANICALLY DISINTERGRATING THE WAX COMPLEX; CONTACTING THE DISINTEGRATED WAX COMPLEX WITH SAID AQUEOUS SOLUTION WHEREBY SAID METAL VALUES ARE TAKEN UP BY SAID WAX COMPLEX; AND SEPARATING THE METAL-CONTAINING WAX COMPLEX FROM A METAL-DEPLETED AQUEOUS WASTE SOLUTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |