Patent US2486240A successfully refreshed from Google Patents.
US2486240A
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Electric circuit for retentive type relays
Assignee: Westinghouse Electric Corp
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Filing: 1945-08-18
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Granted: 1949-10-25
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Expires: 1965-08-18
Abstract
No abstract record available.
Inventors
- 👤 George C Armstrong
- 👤 Owen L Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:24
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/02; H01H47/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1624132A
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US1661651A
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US1915566A
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FR751634A
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US2260810A
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US2257361A
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US2331697A
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US2360954A
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US2404982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |