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US2977443A
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Multi-pole circuit breaker interlock
Assignee: Wadsworth Electric Manufacturing Co
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Filing: 1958-08-18
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Granted: 1961-03-28
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Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 William H Middendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:04
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/1009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2166555A
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US2318085A
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US2306235A
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GB563528A
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US2678359A
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US2824191A
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US2816987A
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US2779831A
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US2797277A
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US2813168A
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US2905795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |