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US2582377A
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Recovery of gallium from alkali metal aluminate solutions
Assignee: Alcoa Corp
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Filing: 1947-04-11
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Granted: 1952-01-15
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Expires: 1967-04-11
Abstract
No abstract record available.
Inventors
- 👤 Brown Ralph Waldo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:58
CPC Classifications
C; C22; C22B; C22B58/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE PROCESS OF PREPARING FROM AN ALKALI METAL ALUMINATE SOLUTION CONTAINING DISSOLVED GALLIUM, A SOLUTION FOR THE PRODUCTION OF METALLIC GALLIUM, COMPRISING INSOLUBILIZING SUFFICIENT OF THE ALUMINUM VALUES OF THE SOLUTION THAT THE ATOMIC RATIO OF DISSOLVED ALUMINUM TO DISSOLVED GALLIUM OF THE RESULTANT SOLUTION IS AT LEAST 25:1, SUBSEQUENTLY CO-PRECIPITATING ALUMINA AND GALLIUM OXIDE FROM THE LATTER SOLUTION BY INTRODUCING CARBON DIOXIDE INTO THAT SULUTION, HEATING THE SAID PRECIPITATE AT A TEMPERATURE OF AT LEAST 300*
Claim 2
Dependent Claim
77 words
THE PROCESS OF PREPARING FROM AN ALKALI METAL ALUMINATE SOLUTION CONTAINING DISSOLVED GALLIUM, A SOLUTION FOR THE PRODUCTION OF METALLIC GALLIUM, COMPRISING INSOLUBILIZING SUFFICIENT OF THE ALUMINUM VALUES OF THE SOLUTION THAT THE ATOMIC RATIO OF DISSOLVED ALUMINUM TO DISSOLVED GALLIUM OF THE RESULTANT SOLUTION IS AT LEAST 25:1, SUBSEQUENTLY CO-PRECIPITATING ALUMINA AND GALLIUM OXIDE FROM THE LATTER SOLUTION BY INTRODUCING CARBON DIOXIDE INTO THAT SULUTION, HEATING THE SAID PRECIPITATE AT A TEMPERATURE OF AT LEAST 300*
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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) | 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 |