US3748186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for filling sealed batteries
Assignee: Hawker Eternacell Inc
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Filing: 1971-12-02
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Granted: 1973-07-24
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Expires: 1991-12-02
Abstract
Abstract A DRY GAS THAT DOES NOT REACT WITH OTHER COMPONENTS OF THE FINISHED BATTERY IS INTRODUCED INTO A BATTERY CASING BY ASSEMBLING THE CASING IN A DRY GAS ATMOSPHERE. THE CASING IS PARTIALLY EVACUATED, AND A LIQUID ELECTROLYTE THAT EXPANDS SUBSTANTIALLY WHEN HEATED IS INTRODUCED. THE CASING IS THEN SEALED IN A GAS TIGHT MANNER. THE RESIDUAL DRY GAS, WHICH PREFERABLY IS DRY AIR, IS COMPRESSED WHEN THE TEMPERATURE RISES PERMITTING THE ELECTROLYTE TO EXPAND WITHOUT LEAKING FROM THE CASING.
Inventors
- 👤 M Rosansky
- 👤 B Jagid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:42
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M10/00; H01M10/34; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |