US2682569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vent plug for storage batteries
Assignee: Individual
•
Filing: 1952-08-04
•
Granted: 1954-06-29
•
Expires: 1972-08-04
Abstract
No abstract record available.
Inventors
- 👤 Owen G Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:38
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/308; H01M50/60; H01M50/609; H01M50/627; H01M50/636; H01M50/645; H01M50/655; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1301993A
Cited
US1992151A
Cited
US2124455A
Cited
US2074329A
Cited
US2262746A
Cited
US2405736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |