Patent US3176897A successfully refreshed from Google Patents.
Patent US2643307A successfully refreshed from Google Patents.
US2643307A
Expired / Lapsed
US
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Electric switch actuator
Assignee: FRANCES E SHREVE
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Filing: 1951-08-16
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Granted: 1953-06-23
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Expires: 1971-08-16
Abstract
No abstract record available.
Inventors
- 👤 John J Geel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:32
CPC Classifications
B; B25; B25C; B25C5/00; B25C5/02; B25C5/0221; B25C5/0228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1582217A
Cited
US1940980A
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US2093689A
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US2272533A
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US2331997A
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US2338365A
Cited
US2570944A
Cited
US2500217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |