US3751304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of boron phosphate sulfuric acid gels
Assignee: United States Department of the Army
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Filing: 1971-02-24
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Granted: 1973-08-07
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Expires: 1991-02-24
Abstract
Abstract A method is described for preventing the release of liquid from a sulfuric acid boron phosphate gel used in water activated lead acid storage batteries, and more particularly the addition of an excess amount of aluminum metal, magnesium or lithium aluminum hydride to this gel.
Inventors
- 👤 R Biddick
- 👤 J Ockerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:43
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/08; H01M10/10; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1403462A
Cited
US3067275A
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US3244564A
Cited
GB975695A
Cited
US3457112A
Cited
US3556860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |