US3067008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering tungsten and vanadium values from organic solvents
Assignee: Union Carbide Corp
•
Filing: 1957-12-09
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Granted: 1962-12-04
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Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Roger L Pilloton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:11
CPC Classifications
C; C01; C01G; C01G31/00; C01G31/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
IN A PROCESS FOR THE RECOVERY OF TUNGSTEN BY SELECTIVE EXTRACTION PROCESS WHEREBY TUNGSTEN VALUES ARE TRANSFERRED TO A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES RECOVERING SAID TUNGSTEN VALUES DIRECTLY FROM THE PREGNANT ORGANIC SOLVENT BY PASSING DRY,GASEOUS AMMONIA THROUGH THE PREGNANT SOLVENT WHEREBY SAID TUNGSTEN VALUES ARE PRECIPITATED AS AMMONIUM PARATUNGSTATE, AND SEPERATING THE PRECIPITATED AMMONIUM PARATUNGSTATE FROM THE ORGANIC SOLVENT.
Claim 2
Dependent Claim
64 words
IN A PROCESS FOR THE RECOVERY OF TUNGSTEN BY SELECTIVE EXTRACTION PROCESS WHEREBY TUNGSTEN VALUES ARE TRANSFERRED TO A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES RECOVERING SAID TUNGSTEN VALUES DIRECTLY FROM THE PREGNANT ORGANIC SOLVENT BY PASSING DRY,GASEOUS AMMONIA THROUGH THE PREGNANT SOLVENT WHEREBY SAID TUNGSTEN VALUES ARE PRECIPITATED AS AMMONIUM PARATUNGSTATE, AND SEPERATING THE PRECIPITATED AMMONIUM PARATUNGSTATE FROM THE ORGANIC SOLVENT.
Claim 3
Dependent Claim
65 words
IN A PROCESS FOR THE RECOVERY OF VANADIUM BY SELECTIVE EXTRACTION PROCESSES WHEREBY CANADIUM VALUES ARE TRANSFERRED TO A SUNSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES RECOVERING SAID VANADIUM VALUES DIRECTLY FROM THE PREGNANT ORGANIC SOLVENT BY PASSING DRY, GASEOUS AMMONIA THROUGH THE PREGNANT SOLVENT WHEREBY SAID VANADIUM VALUES ARE PRECIPITATED AS AMMONIUM VANADATE, AND SEPARATING THE PRECIPITATED AMMONIUM VANADATE FROM THE ORGANIC SOLVENT.
Claim 4
Dependent Claim
65 words
IN A PROCESS FOR THE RECOVERY OF VANADIUM BY SELECTIVE EXTRACTION PROCESSES WHEREBY CANADIUM VALUES ARE TRANSFERRED TO A SUNSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES RECOVERING SAID VANADIUM VALUES DIRECTLY FROM THE PREGNANT ORGANIC SOLVENT BY PASSING DRY, GASEOUS AMMONIA THROUGH THE PREGNANT SOLVENT WHEREBY SAID VANADIUM VALUES ARE PRECIPITATED AS AMMONIUM VANADATE, AND SEPARATING THE PRECIPITATED AMMONIUM VANADATE FROM THE ORGANIC SOLVENT.
References Cited (Backward Citations)
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US2227833A
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US2261371A
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US2798831A
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US2765270A
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US2791499A
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US2795481A
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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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |