Patent US3065046A successfully refreshed from Google Patents.
US3065046A
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Process for recovering tantalum and niobium values from organic solutions
Assignee: Millennium Petrochemicals Inc
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Filing: 1959-04-06
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Granted: 1962-11-20
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Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Foos
- 👤 Greenberg Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:22
CPC Classifications
C; C01; C01G; C01G35/00; C01P; C01P2006/00; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PORCESS FOR RECOVERING METAL VALUES SELECTED FROM THE GROUP CONSISTING OF TANTALUM, COLIMBIUM, AND MIXTURES THEREOF WHICH COMPRISES (1) ADDING A POTASSIUMCONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF POTASSIUM FLUROIDE, POTASSIUM CHLORIDE, POTASSIUM CARBONATE, AND POTASSIUM HYDROXIDE TO AN ORGANIC SOLUTION CONTAINING (A) A WATER-IMMISCIBLE OXYGEN-CONTAINING ORGANIC SOLVENT, (B) FREE-HYDROFLUORIC ACID IN AN AMOUNT RANGING FROM ABOUT 1 TO 20 GRAMS PER LITER OF ORGANIC SOLUTION, AND (C) FLUOCOMPLEXES OF SAID METAL VALUES TO PRECIPITATE POTASSIUM DOUBLE FLUORIDE SALTS OF SAIF METAL VALUES AND (2) RECOVERING SAID POTASSIUM DOUBLE FLUORIDE SALTS, SAID SALTS BEING SELECTED FROM THE GROUP CONSISTING OF POTASSIUM FLUOTANTALATE, POTASSIUM FLUOCOLUMBATE, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
109 words
A PORCESS FOR RECOVERING METAL VALUES SELECTED FROM THE GROUP CONSISTING OF TANTALUM, COLIMBIUM, AND MIXTURES THEREOF WHICH COMPRISES (1) ADDING A POTASSIUMCONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF POTASSIUM FLUROIDE, POTASSIUM CHLORIDE, POTASSIUM CARBONATE, AND POTASSIUM HYDROXIDE TO AN ORGANIC SOLUTION CONTAINING (A) A WATER-IMMISCIBLE OXYGEN-CONTAINING ORGANIC SOLVENT, (B) FREE-HYDROFLUORIC ACID IN AN AMOUNT RANGING FROM ABOUT 1 TO 20 GRAMS PER LITER OF ORGANIC SOLUTION, AND (C) FLUOCOMPLEXES OF SAID METAL VALUES TO PRECIPITATE POTASSIUM DOUBLE FLUORIDE SALTS OF SAIF METAL VALUES AND (2) RECOVERING SAID POTASSIUM DOUBLE FLUORIDE SALTS, SAID SALTS BEING SELECTED FROM THE GROUP CONSISTING OF POTASSIUM FLUOTANTALATE, POTASSIUM FLUOCOLUMBATE, AND MIXTURES THEREOF.
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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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |