Patent US2789180A successfully refreshed from Google Patents.
US2789180A
Expired / Lapsed
US
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Electric circuit-breakers and parts therefor
Assignee: Cutler Hammer Inc
•
Filing: 1953-09-02
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Granted: 1957-04-16
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Expires: 1973-09-02
Abstract
No abstract record available.
Inventors
- 👤 Irvin W Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:43
CPC Classifications
H; H01; H01H; H01H73/00; H01H73/60; H01H77/00; H01H77/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1639888A
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US1781288A
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US1935906A
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US2073286A
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US2191501A
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US2171866A
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US2288517A
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US2338563A
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US2484932A
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US2496332A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |