Patent US2866159A successfully refreshed from Google Patents.
US2866159A
Expired / Lapsed
US
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Apparatus responsive to the product of voltage and current of electrical circuits
Assignee: Westinghouse Electric Corp
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Filing: 1953-02-26
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Granted: 1958-12-23
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Expires: 1973-02-26
Abstract
No abstract record available.
Inventors
- 👤 Willard A Derr
- 👤 Edward J Cham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:55
CPC Classifications
G; G01; G01R; G01R21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |