US3829331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium borate glass compositions and batteries containing same
Assignee: Dow Chemical Co
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Filing: 1971-12-30
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Granted: 1974-08-13
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Expires: 1991-12-30
Abstract
Abstract AN AMORPHOUS GLASS SYSTEM BASED ON SODIUM BORATE, WHICH MAY ALSO CONTAIN ADDITIVES TO MODIFY VISCOSITY, EXPANSION COEFFICIENT, AND THE LIKE, HAS FOUND PARTICULAR UTILITY AS THE MEMBRANE MATERIAL IN ALKALI METAL-SULFUR BATTERIES DUE TO ITS INERTNESS TOWARDS SODIUM, SULFUR AND SODIUM SULFIDE, AS WELL AS ITS EXCELLENT ABILITY TO CONDUCT SODIUM IONS.
Inventors
- 👤 F Tsang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:22
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C13/00; C03C3/14; C03C3/23; C03C3/247; C03C3/32; C03C4/00; C03C4/18; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |