US2447656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed gas-operated circuit interrupter with position indicator
Assignee: Westinghouse Electric Corp
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Filing: 1944-05-24
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Granted: 1948-08-24
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Expires: 1964-05-24
Abstract
No abstract record available.
Inventors
- 👤 Leon R Ludwig
- 👤 Benjamin P Baker
- 👤 James M Cumming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:14
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1017052A
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US1356598A
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US1408611A
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US2089286A
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US2320655A
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GB545536A
Cited
US2255496A
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US2389942A
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US2282007A
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US2292095A
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US2282153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |