Patent US3079226A successfully refreshed from Google Patents.
US3079226A
Expired / Lapsed
US
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Tungsten extraction and purification process
Assignee: General Electric Co
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Filing: 1960-06-01
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Granted: 1963-02-26
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Expires: 1980-06-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Newkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:26
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/36; C22B3/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS OF TREATING TUNGSTEN ORES SELECTED FROM THE GROUP CONSISTING OF SCHEELITE AND WOLFRAMITE TYPE ORES TO OBTAIN TUNGSTEN VALUES SUBSTANTIALLY FREE OF MOLYBDENUM VALUES WHICH CONSISTS ESSENTIALLY OF (1) CONVERTING SUBSTANTIALLY ALL OF THE TUNGSTEN VALUES OF TUNGSTIC ACID BY DIGESTING THE ORE WITH AN AQUEOUS SOLUTION CONTAINING SUFFICIENT HYDROCHLORIDE ACID THAT THE SOLUTION IS AT LEAST 4 MOLAR WITH RESPECT TO HYDROCHLORIC ACID AT THE END OF THE DIGESTION PERIOD, (2) EXTRACTING MOLYBDENUM VALUES FROM THE MIXTURE WITH METHYL ISOBUTYL KETONE, AND (3) SEPARATING THE SOLID, PURIFIED TUNGSTEN VALUES FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
96 words
A PROCESS OF TREATING TUNGSTEN ORES SELECTED FROM THE GROUP CONSISTING OF SCHEELITE AND WOLFRAMITE TYPE ORES TO OBTAIN TUNGSTEN VALUES SUBSTANTIALLY FREE OF MOLYBDENUM VALUES WHICH CONSISTS ESSENTIALLY OF (1) CONVERTING SUBSTANTIALLY ALL OF THE TUNGSTEN VALUES OF TUNGSTIC ACID BY DIGESTING THE ORE WITH AN AQUEOUS SOLUTION CONTAINING SUFFICIENT HYDROCHLORIDE ACID THAT THE SOLUTION IS AT LEAST 4 MOLAR WITH RESPECT TO HYDROCHLORIC ACID AT THE END OF THE DIGESTION PERIOD, (2) EXTRACTING MOLYBDENUM VALUES FROM THE MIXTURE WITH METHYL ISOBUTYL KETONE, AND (3) SEPARATING THE SOLID, PURIFIED TUNGSTEN VALUES FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
GB241399A
Cited
US2202525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |