Patent US2907840A successfully refreshed from Google Patents.
US2907840A
Expired / Lapsed
US
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Front operated enclosed switching apparatus
Assignee: Federal Pacific Electric Co
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Filing: 1957-10-14
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Granted: 1959-10-06
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Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/20; H01H9/22; H01H71/00; H01H71/10; H01H71/50; H01H71/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |