Patent US2835720A successfully refreshed from Google Patents.
US2835720A
Expired / Lapsed
US
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Battery vent plug
Assignee: Motors Liquidation Co
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Filing: 1955-05-09
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Granted: 1958-05-20
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Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 John E Buskirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:01
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/308; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |