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US4307138A
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Sintered ion-conductive composite electrolyte of beta-alumina and beta"-alumina
Assignee: General Electric Co
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Filing: 1980-05-23
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Granted: 1981-12-22
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Expires: 2000-05-23
Abstract
Abstract A composite beta, mainly beta"-alumina article is described which comprises a first layer of beta-alumina, a second layer of mainly beta"-alumina adhering securely to the first layer, and the first layer consisting of 1 to 15 percent thickness of the total thickness of the article. A method is also described for producing such composite articles.
Inventors
- 👤 Robert W. Powers
- 👤 John C. Bielawski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:32
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/113; C25; C25D; C25D1/00; C25D1/12; C25D1/14; C25D13/00; C25D13/02; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; H01M10/3927; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A sintered ion-conductive composite electrolyte comprising a first layer of beta-alumina, a second layer of mainly beta"-alumina integrally adhered to the first layer and at least substantially coextensive therewith, and the first layer consisting of 1 to 15 percent of the total thickness of the electrolyte.
Claim 2
Dependent Claim
46 words
A sintered ion-conductive composite electrolyte comprising a first layer of beta-alumina, a second layer of mainly beta"-alumina integrally adhered to the first layer and at least substantially coextensive therewith, and the first layer consisting of 1 to 15 percent of the total thickness of the electrolyte.
Claim 3
Dependent Claim
49 words
A composite electrolyte as in claim 1, in which the electrolyte is a tube with an open end and a closed end, the first layer of beta-alumina layer is the inner layer of the tube, and the second layer of mainly beta"-alumina is the outer layer of the tube.
Claim 4
Dependent Claim
48 words
A composite electrolyte as in claim 1, in which the electrolyte is a tube with an open end and a closed end, the first layer of beta-alumina is the outer layer of the tube, and the second layer of mainly beta"-alumina is the inner layer of the tube.
References Cited (Backward Citations)
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Cited
US3896018A
Cited
US4013477A
Cited
US4138455A
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US4117056A
Cited
US4197171A
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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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |