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US2491640A
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Deferred action battery
Assignee: Burgess Battery Co
•
Filing: 1945-06-20
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Granted: 1949-12-20
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Expires: 1965-06-20
Abstract
No abstract record available.
Inventors
- 👤 Ivan C Blake
- 👤 Lawrence H Harriss
- 👤 John B Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:53
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32; H01M6/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US431073A
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US815628A
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US1488908A
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US1467240A
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US1601457A
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US1696873A
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US2050173A
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US2301390A
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US2379374A
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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) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |