Patent US2663776A successfully refreshed from Google Patents.
US2663776A
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US
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Protective device
Assignee: Westinghouse Electric Corp
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Filing: 1949-08-18
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Granted: 1953-12-22
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Expires: 1969-08-18
Abstract
No abstract record available.
Inventors
- 👤 Arthur T Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:32
CPC Classifications
H; H01; H01H; H01H73/00; H01H73/22; H01H73/34; H01H33/00; H01H33/02; H01H33/04; H01H33/06; H01H73/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973378A
Cited
US2272717A
Cited
US2301746A
Cited
US2280493A
Cited
US2424126A
Cited
US2357853A
Cited
US2472625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |