US2707218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-break circuit interrupters
Assignee: Westinghouse Electric Corp
•
Filing: 1951-05-31
•
Granted: 1955-04-26
•
Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Albert R Cellerini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:13
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/34; H01H9/342
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1868442A
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US1896764A
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US2140360A
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US2147419A
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US2147430A
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US2160681A
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US2244061A
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US2276859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |