Patent US2830158A successfully refreshed from Google Patents.
US2830158A
Expired / Lapsed
US
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Electric switches or circuit breakers
Assignee: JA Crabtree and Co Ltd
•
Filing: 1955-07-18
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Granted: 1958-04-08
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Coleman Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:30
CPC Classifications
H; H01; H01H; H01H73/00; H01H73/02; H01H73/18; H01H9/00; H01H9/30; H01H2009/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1413426A
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US1547009A
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US2268336A
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US2150838A
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US2291466A
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US2473848A
Cited
US2551822A
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US2719203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |