Patent US2481996A successfully refreshed from Google Patents.
US2481996A
Expired / Lapsed
US
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Air blast circuit breaker
Assignee: FERGUSON PAILIN Ltd
•
Filing: 1945-04-02
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Granted: 1949-09-13
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Expires: 1965-04-02
Abstract
No abstract record available.
Inventors
- 👤 Grunewald Friedrich
- 👤 Dakin Eric Mc-Ewan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:22
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/7015; H01H33/7038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR754972A
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US2302592A
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US2313159A
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US2306242A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |