US2977446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed-gas circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1956-10-22
•
Granted: 1961-03-28
•
Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Benjamin P Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:43
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2067673A
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US2470628A
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US2447656A
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GB582599A
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US2459600A
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US2530939A
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US2581822A
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US2665351A
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US2672541A
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US2821607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |