Patent US2582378A successfully refreshed from Google Patents.
US2582378A
Expired / Lapsed
US
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Process of producing gallium
Assignee: Alcoa Corp
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Filing: 1947-09-17
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Granted: 1952-01-15
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Expires: 1967-09-17
Abstract
No abstract record available.
Inventors
- 👤 Brown Ralph Waldo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:18
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
THE PROCESS OF PRODUCING GALLIUM COMPRISING THE STEPS OF FORMING AN AQUEOUS ALKALI METAL ALUMINATE SOLUTION CONTAINING DISSOLVED GALLIUM, DECREASING THE ATOMIC RATIO OF ALUMINUM TO GALLIUM IN THE RESULTANT SOLUTION BY INSOLUBLIZING SUFFICIENT OF THE DISSOLVED ALUMINUM VALUES OF THAT SOLUTION AS CALCIUM ALUMINATE THAT THE ATOMIC RATIO OF DISSOLVED ALUMINUM TO DISSOLVED GALLIUM IN THE SOLUTION LIES IN THE RANGE OF FROM 25:1 TO 100:1, SUBSEQUENTLY CO-PRECIPITATING GALLIUM OXIDE AND ALUMINA FROM THE SAID SOLUTION BY INTRODUCING AN ACIDIC MATERIAL THEREINTO, DISSOLVING THE CO-PRECIPITATED GALLIUM OXIDE AND ALUMINA AN AQUEOUS ALKALI METAL HYDROXIDE SOLUTION, ELECTRODEPOSITING PART OF THE DISSOLVED GALLIUM FROM THE RESULTANT SOLUTION AS METALLIC GALLIUM, THEREAFTER MIXING THE GALLIUM-BEARING ELECTROLYTE FROM THE LAST-MENTIONED STEP WITH ADDITIONAL AQUEOUS ALKALI METAL ALUMINATE SOLUTION CONTAINING DISSOLVED GALLIUM, AND EMPLOYING THE RESULTANT MIXTURE IN THE SAID SECOND-MENTIONED STEP IN FURTHER OPERATION OF THE PROCESS.
Claim 2
Dependent Claim
144 words
THE PROCESS OF PRODUCING GALLIUM COMPRISING THE STEPS OF FORMING AN AQUEOUS ALKALI METAL ALUMINATE SOLUTION CONTAINING DISSOLVED GALLIUM, DECREASING THE ATOMIC RATIO OF ALUMINUM TO GALLIUM IN THE RESULTANT SOLUTION BY INSOLUBLIZING SUFFICIENT OF THE DISSOLVED ALUMINUM VALUES OF THAT SOLUTION AS CALCIUM ALUMINATE THAT THE ATOMIC RATIO OF DISSOLVED ALUMINUM TO DISSOLVED GALLIUM IN THE SOLUTION LIES IN THE RANGE OF FROM 25:1 TO 100:1, SUBSEQUENTLY CO-PRECIPITATING GALLIUM OXIDE AND ALUMINA FROM THE SAID SOLUTION BY INTRODUCING AN ACIDIC MATERIAL THEREINTO, DISSOLVING THE CO-PRECIPITATED GALLIUM OXIDE AND ALUMINA AN AQUEOUS ALKALI METAL HYDROXIDE SOLUTION, ELECTRODEPOSITING PART OF THE DISSOLVED GALLIUM FROM THE RESULTANT SOLUTION AS METALLIC GALLIUM, THEREAFTER MIXING THE GALLIUM-BEARING ELECTROLYTE FROM THE LAST-MENTIONED STEP WITH ADDITIONAL AQUEOUS ALKALI METAL ALUMINATE SOLUTION CONTAINING DISSOLVED GALLIUM, AND EMPLOYING THE RESULTANT MIXTURE IN THE SAID SECOND-MENTIONED STEP IN FURTHER OPERATION OF THE PROCESS.
References Cited (Backward Citations)
US461416A
Cited
US663167A
Cited
US1013022A
Cited
US941799A
Cited
US1855455A
Cited
US1971354A
Cited
GB381520A
Cited
GB423594A
Cited
US2320773A
Cited
US2361143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |