US2913557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1956-10-22
•
Granted: 1959-11-17
•
Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Immel
- 👤 Marshall P White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:42
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/44; H01H9/443; H01H33/00; H01H33/02; H01H33/59; H01H33/596
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR873138A
Cited
US2304972A
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US2332446A
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CH233956A
Cited
US2356040A
Cited
DE762440C
Cited
US2411892A
Cited
US2443017A
Cited
FR981687A
Cited
US2561450A
Cited
US2575060A
Cited
FR60753E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |