Patent US3892589A successfully refreshed from Google Patents.
US3892589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed battery construction
Assignee: Hawker Eternacell Inc
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Filing: 1973-04-24
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Granted: 1975-07-01
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Expires: 1993-04-24
Abstract
Abstract Dry air that does not react with other components of a battery is included in a battery casing by assembling the casing in a dry air 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 air is compressed when the temperature rises permitting the electrolyte to expand without leaking from the casing.
Inventors
- 👤 Martin G Rosansky
- 👤 Bruce E Jagid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:32
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A NON-AQUEOUS ELECTRIC CURRENT-PRODUCING CELL COMPRISING A SEALED BATTERY CASING CONTAINING A NEGATIVE ELECTRODE MADE FROM A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EATH METALS, A POSITIVE ELECTRODE, A SEPARATOR FOR INSULATING THE ELECTRODES FROM EACH OTHER, A LIQUID ELECTROLYTE THAT EXPANDS SUBSTANTIALLY THE HEATED, INCLUDING SO2 IN THE FORM OF AN ANHYDROUS LIQUID MIXED WITH A COSOLVENT OF AT LEAST ONE ANHYDROUS LIQUID ORGANIC COMPOUND THAT IS INERT WITH RESPECT TO THE NEGATIVE ELECTRODE, AND A PREDETERMINED QUANTITY OF DRY AIR THAT DOES NOT REACT WITH OTHER COMPONENTS OF THE CELL WHEREBY THE LIQUID ELECTROLYTE IS
Claim 2
Dependent Claim
102 words
A NON-AQUEOUS ELECTRIC CURRENT-PRODUCING CELL COMPRISING A SEALED BATTERY CASING CONTAINING A NEGATIVE ELECTRODE MADE FROM A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EATH METALS, A POSITIVE ELECTRODE, A SEPARATOR FOR INSULATING THE ELECTRODES FROM EACH OTHER, A LIQUID ELECTROLYTE THAT EXPANDS SUBSTANTIALLY THE HEATED, INCLUDING SO2 IN THE FORM OF AN ANHYDROUS LIQUID MIXED WITH A COSOLVENT OF AT LEAST ONE ANHYDROUS LIQUID ORGANIC COMPOUND THAT IS INERT WITH RESPECT TO THE NEGATIVE ELECTRODE, AND A PREDETERMINED QUANTITY OF DRY AIR THAT DOES NOT REACT WITH OTHER COMPONENTS OF THE CELL WHEREBY THE LIQUID ELECTROLYTE IS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |