Patent US3545920A successfully refreshed from Google Patents.
US3545920A
Expired / Lapsed
US
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Process for extracting aluminum from solutions
Assignee: United States Department of the Interior
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Filing: 1968-02-26
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Granted: 1970-12-08
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Expires: 1988-02-26
Abstract
No abstract record available.
Inventors
- 👤 D Arcy R George
- 👤 Samuel Ralph Borrowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:37
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0015; C01; C01F; C01F7/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2217099A
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US2951743A
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US3078146A
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US3240562A
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US3211521A
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US3320032A
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US3330622A
Cited
US3383166A
Cited
US3343912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |