Patent US2849680A successfully refreshed from Google Patents.
US2849680A
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US
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Electrical instruments responsive to alternating energization
Assignee: Westinghouse Electric Corp
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Filing: 1952-05-31
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Granted: 1958-08-26
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Expires: 1972-05-31
Abstract
No abstract record available.
Inventors
- 👤 Bernard E Lenehan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:05
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02; G01R11/17; G01R11/18; G01R11/185; H; H01; H01H; H01H53/00; H01H53/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US853218A
Cited
GB171836A
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DE378063C
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US1654306A
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US1695878A
Cited
US1573546A
Cited
US1695861A
Cited
US2181644A
Cited
US2328728A
Cited
US2363284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |