Patent US2947828A successfully refreshed from Google Patents.
US2947828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition breaker
Assignee: Duracell Inc USA
•
Filing: 1957-10-04
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Granted: 1960-08-02
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Expires: 1977-10-04
Abstract
No abstract record available.
Inventors
- 👤 Lloyd F Neely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:41
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US638680A
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US1280566A
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US2290469A
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US2632818A
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US2689892A
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US2720561A
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US2856473A
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US2831078A
Cited
US2834857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |