Patent US2232279A successfully refreshed from Google Patents.
US2232279A
Expired / Lapsed
US
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Vent plug for aircraft batteries
Assignee: National Battery Co
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Filing: 1938-03-16
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Granted: 1941-02-18
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Expires: 1958-03-16
Abstract
No abstract record available.
Inventors
- 👤 Almond H Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:54
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/308; H01M50/317; H01M50/325; H01M50/333; H01M50/60; H01M50/609; H01M50/627; H01M50/636; H01M50/645; H01M50/655; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S137/00; Y10S137/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |