Patent US2437422A successfully refreshed from Google Patents.
US2437422A
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US
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Protective gas-permeable container for air-depolarized cells
Assignee: Thomas A Edison Inc
•
Filing: 1944-08-24
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Granted: 1948-03-09
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Expires: 1964-08-24
Abstract
No abstract record available.
Inventors
- 👤 Le Roy S Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:52
CPC Classifications
H; H01; H01M; H01M12/00; H01M12/04; H01M12/06; H01M50/00; H01M50/30; H01M50/394; H01M50/20; H01M50/253; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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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) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |