US2682568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery cap
Assignee: Individual
•
Filing: 1951-11-02
•
Granted: 1954-06-29
•
Expires: 1971-11-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Stofen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:56
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)
US1012096A
Cited
US1010695A
Cited
US1260379A
Cited
US1244909A
Cited
US1869258A
Cited
GB329188A
Cited
US1996292A
Cited
US2321892A
Cited
FR932940A
Cited
US2480437A
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 |