Patent US2647188A successfully refreshed from Google Patents.
US2647188A
Expired / Lapsed
US
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Electrical switch contact means
Assignee: Individual
•
Filing: 1950-01-12
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Granted: 1953-07-28
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Expires: 1970-01-12
Abstract
No abstract record available.
Inventors
- 👤 Edward J Poitras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:38
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US666764A
Cited
GB214325A
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US1651408A
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US1978065A
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US2334897A
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US2242971A
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US2286375A
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US2389686A
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US2444745A
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US2492023A
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US2496917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |