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US3486944A
Expired / Lapsed
US
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Battery with reserve cell
Assignee: FRANK O DONNELL
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Filing: 1967-12-07
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Granted: 1969-12-30
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Expires: 1987-12-07
Abstract
No abstract record available.
Inventors
- 👤 Frank O'donnell
- 👤 George Scocca Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:10
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/50; H01M6/5011; H01M50/00; H01M50/20; H01M50/204; H01M50/207; H01M50/213; H01M6/42; H01M6/44
Claims Analysis
Total Claims: 0
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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) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |