Patent US2962349A successfully refreshed from Google Patents.
US2962349A
Expired / Lapsed
US
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Process for recovering a metal tungstate from an alkaline trona process brine
Assignee: Individual
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Filing: 1957-08-26
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Granted: 1960-11-29
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jr J Hill Anglin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:13
CPC Classifications
C; C01; C01G; C01G41/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESS FOR THE RECOVERY OF A TUNGSTATE FROM AN ALKALINE TRONA PROCESS BRINE CONTAINING TUNGSTEN VALUES AT A CONCENTRATION OF LESS THAN 1% BY WEIGHT BASED ON TUNGSTIC OXIDE AND HAVING A RELATIVELY HIGH CONCENTRATION OF A CARBONATE WITH RESPECT TO SAID TUNGSTEN VALUES, COMPRISING THE STEPS OF ADJUSTING THE PH OF SAID ALKALINE BRINE TO FROM ABOUT 4.5 TO ABOUT 5.5, DISSOLVING IN SAID ALKALINE BRINE FROM AN AMOUNT STOICHIOMETRICALLY SUFFICIENT TO PRECIPITATE THE TUNGSTEN VALUES TO AMOUNT 10% BY WEIGHT IN EXCESS OF SAID STOICHIOMETRIC AMOUNT OF A WATER-SOLUBLE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, CADMIUM, IRON, NICKEL, COBALT, CHROMIUM AND MANGANESE, WHEREBY A TUNGSTATE OF SAID METAL IS PRECIPITATED, AND SEPARATING THE PRECIPITATED TUNGSTAGE.
Claim 2
Dependent Claim
123 words
A PROCESS FOR THE RECOVERY OF A TUNGSTATE FROM AN ALKALINE TRONA PROCESS BRINE CONTAINING TUNGSTEN VALUES AT A CONCENTRATION OF LESS THAN 1% BY WEIGHT BASED ON TUNGSTIC OXIDE AND HAVING A RELATIVELY HIGH CONCENTRATION OF A CARBONATE WITH RESPECT TO SAID TUNGSTEN VALUES, COMPRISING THE STEPS OF ADJUSTING THE PH OF SAID ALKALINE BRINE TO FROM ABOUT 4.5 TO ABOUT 5.5, DISSOLVING IN SAID ALKALINE BRINE FROM AN AMOUNT STOICHIOMETRICALLY SUFFICIENT TO PRECIPITATE THE TUNGSTEN VALUES TO AMOUNT 10% BY WEIGHT IN EXCESS OF SAID STOICHIOMETRIC AMOUNT OF A WATER-SOLUBLE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, CADMIUM, IRON, NICKEL, COBALT, CHROMIUM AND MANGANESE, WHEREBY A TUNGSTATE OF SAID METAL IS PRECIPITATED, AND SEPARATING THE PRECIPITATED TUNGSTAGE.
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) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |