Patent US2681712A successfully refreshed from Google Patents.
Patent US3216859A successfully refreshed from Google Patents.
US3216859A
Expired / Lapsed
US
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Secondary battery separator and electrode assembly
Assignee: Exide Technologies LLC
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Filing: 1961-11-17
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Granted: 1965-11-09
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Expires: 1981-11-17
Abstract
No abstract record available.
Inventors
- 👤 Duncan Edward Carlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:13
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/411; H01M50/414; H01M50/429; H01M50/4295; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN ELECTRIC BATTERY HAVING A POSITIVE ELECTRODE AND A NEGATIVE ELECTRODE, A SEPARATOR BETWEEN SAID ELECTRODES COMPRISING A SHEET OF ELECTROLYTE PERMEABLE INSULATING MATERIAL OF THE TYPE WHICH EXHIBITS A SUBSTANTIAL INCREASE IN THICKNESS WHEN WET WITH ELECTROLYTE, AT LEAST ONE FREE-END PORTION OF SAID SEPARATOR EXTENDING ABOVE SAID ELECTRODES AT LEAST ONE OF SAID FREE-END PORTIONS EXTENDING ABOVE SAID ELECTRODES BEING FOLDED OVER UPON ITSELF AT LEAST ONCE ABOVE SAID ELECTRODES TO PROVIDE AT LEAST ONE ADDITIONAL THICKNESS OF SAID SHEET MATERIAL ABOVE SAID ELECTRODES WHICH UPON
Claim 2
Dependent Claim
88 words
AN ELECTRIC BATTERY HAVING A POSITIVE ELECTRODE AND A NEGATIVE ELECTRODE, A SEPARATOR BETWEEN SAID ELECTRODES COMPRISING A SHEET OF ELECTROLYTE PERMEABLE INSULATING MATERIAL OF THE TYPE WHICH EXHIBITS A SUBSTANTIAL INCREASE IN THICKNESS WHEN WET WITH ELECTROLYTE, AT LEAST ONE FREE-END PORTION OF SAID SEPARATOR EXTENDING ABOVE SAID ELECTRODES AT LEAST ONE OF SAID FREE-END PORTIONS EXTENDING ABOVE SAID ELECTRODES BEING FOLDED OVER UPON ITSELF AT LEAST ONCE ABOVE SAID ELECTRODES TO PROVIDE AT LEAST ONE ADDITIONAL THICKNESS OF SAID SHEET MATERIAL ABOVE SAID ELECTRODES WHICH UPON
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |