US2582376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing gallium
Assignee: Alcoa Corp
•
Filing: 1947-04-05
•
Granted: 1952-01-15
•
Expires: 1967-04-05
Abstract
No abstract record available.
Inventors
- 👤 Francis C Frary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:49
CPC Classifications
C; C22; C22B; C22B58/00; C25; C25C; C25C1/00; C25C1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF PRODUCING A SOLUTION CONTAINING DISSOLVED GALLIUM FROM A SOLUTION CONTAINING ALKALI METAL ALUMINATE WITH GALLIUM DISSOLVED THEREIN COMPRISING INSOLUBLIZING AT LEAST THE MAJOR PORTION OF THE ALUMINA VALUES OF THE SAID SOLUTION BY ADDING TO THAT SOLUTION A CALCIUM COMPOUND WHICH WILL FROM PRECIPITATED CALCIUM ALUMINATE IN THE SOLUTION BY REACTION, THEREAFTER PRECIPITATING GALLIUM OXIDE FROM THE SOLUTION, AND SUBSEQUENTLY DISSOLVING THE PRECIPITATED GALLIUM OXIDE IN A SOLVENT THEREFOR, THE CONCENTRATION OF DISSOLVED GALLIUM IN THE LAST-MENTIONED SOLUTION BEING GREATER THAN THE CONCENTRATION OF DISSOLVED GALLIUM IN THE FIRST-MENTIONED SOLUTION.
Claim 2
Independent Claim
93 words
THE METHOD OF PRODUCING A SOLUTION CONTAINING DISSOLVED GALLIUM FROM A SOLUTION CONTAINING ALKALI METAL ALUMINATE WITH GALLIUM DISSOLVED THEREIN COMPRISING INSOLUBLIZING AT LEAST THE MAJOR PORTION OF THE ALUMINA VALUES OF THE SAID SOLUTION BY ADDING TO THAT SOLUTION A CALCIUM COMPOUND WHICH WILL FROM PRECIPITATED CALCIUM ALUMINATE IN THE SOLUTION BY REACTION, THEREAFTER PRECIPITATING GALLIUM OXIDE FROM THE SOLUTION, AND SUBSEQUENTLY DISSOLVING THE PRECIPITATED GALLIUM OXIDE IN A SOLVENT THEREFOR, THE CONCENTRATION OF DISSOLVED GALLIUM IN THE LAST-MENTIONED SOLUTION BEING GREATER THAN THE CONCENTRATION OF DISSOLVED GALLIUM IN THE FIRST-MENTIONED SOLUTION.
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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 |