US3878296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of lithium carbonate and fibrous aluminum oxide to produce lithium aluminate
Assignee: RTX Corp
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Filing: 1971-08-18
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Granted: 1975-04-15
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Expires: 1991-08-18
Abstract
Abstract An electrolyte matrix comprising fibrous lithium aluminate for use in an electrochemical cell comprising an alkali or alkaline earth carbonate electrolyte is described. The matrix has good thermal cycle characteristics from ambient to the operating temperature of the cell, and good electrolyte retention and wicking properties.
Inventors
- 👤 Raymond W Vine
- 👤 William J Harrison
- 👤 Roger C Emanuelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:06
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/14; H01M8/141; H01M8/142; H01M8/02; H01M8/0289; H01M8/0295; H01M2008/147; H01M2300/00; H01M2300/0017; H01M2300/0048; H01M2300/0051; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD OF PRODUCING FIBROUS LITHIUM ALUMINATE COMPRISING THE STEPS OF PROVIDING A UNIFORM ADMIXTURE OF LITHIUM CARBONATE AND ALUMINUM OXIDE FIBERS AND HEATING SAID MIXTURE AT A TEMPERATURE SUFFICIENT TO CONVERT THE ALUMNIUM OXIDE TO LITHIUM ALUMINATE, THE RATIO OF ALUMINUM OXIDE FIBERS TO LITHIUM CARBONATE BEING FROM 1:3 TO 3:1.
Claim 2
Independent Claim
52 words
THE METHOD OF PRODUCING FIBROUS LITHIUM ALUMINATE COMPRISING THE STEPS OF PROVIDING A UNIFORM ADMIXTURE OF LITHIUM CARBONATE AND ALUMINUM OXIDE FIBERS AND HEATING SAID MIXTURE AT A TEMPERATURE SUFFICIENT TO CONVERT THE ALUMNIUM OXIDE TO LITHIUM ALUMINATE, THE RATIO OF ALUMINUM OXIDE FIBERS TO LITHIUM CARBONATE BEING FROM 1:3 TO 3:1.
References Cited (Backward Citations)
US2474440A
Cited
US2691738A
Cited
US3257239A
Cited
US3266940A
Cited
US3271173A
Cited
US3352650A
Cited
US3514336A
Cited
US3492119A
Cited
US3622394A
Cited
US3547180A
Cited
US3663295A
Cited
US3658469A
Cited
US3607436A
Cited
US3625773A
Cited
US3705223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |