US2810048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex circuit breaker
Assignee: Federal Electric Products Co
•
Filing: 1952-08-12
•
Granted: 1957-10-15
•
Expires: 1972-08-12
Abstract
No abstract record available.
Inventors
- 👤 Paul M Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:22
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/1045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1712563A
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US1938309A
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US2174669A
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US2209319A
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US2370340A
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USRE23188E
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US2583174A
Cited
US2629796A
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US2627563A
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US2642509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |