US3793433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of lithium from neutral brines using a beta diketone and trioctylphosphine oxide
Assignee: United States Atomic Energy Commission
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Filing: 1971-07-23
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Granted: 1974-02-19
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Expires: 1991-07-23
Abstract
Abstract THE PRESENT INVENTION RELATES TO A ME;THOD OF EXTRACTING LITHIUM VALUES FROM NEUTRAL OR NEAR-NEUTRAL AQUEOUS BRINES BY THE USE OF A SOLVENT EXTRACTION SCHEME WHERE THE EFFECTIVE EXTRACTANT IS PROVIDED BY THE SYNERGISTIC ACTION OF (1) B-KETONE AND ANALOGUES THEREOF IN WHICH THE B CARBON ATOM OF SAID B-KETONE OR ANALOGUE IS JOINED TO AT LEAST TWO HALOGEN ATOMS, AND (2) A LEWIS-BASE SOLVATING LIGAND MORE BASIC THAN WATER.
Inventors
- 👤 F Seeley
- 👤 W Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:59
CPC Classifications
C; C01; C01D; C01D15/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0492
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |