Patent US2678983A successfully refreshed from Google Patents.
US2678983A
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Compressed gas circuit interrupter
Assignee: Westinghouse Electric Corp
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Filing: 1950-05-16
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Granted: 1954-05-18
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Expires: 1970-05-16
Abstract
No abstract record available.
Inventors
- 👤 Albert P Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:44
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/7015; H01H33/7038; H01H33/7046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1961475A
Cited
US1987885A
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GB418737A
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US2440995A
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US2481996A
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US2561192A
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US2427195A
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FR916754A
Cited
GB602966A
Cited
US2588933A
Cited
US2551772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |