US2663846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrating direct current wattmeter
Assignee: Weston Electric Instrument Corp
•
Filing: 1949-08-05
•
Granted: 1953-12-22
•
Expires: 1969-08-05
Abstract
No abstract record available.
Inventors
- 👤 Roswell W Gillbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:25
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1743137A
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US1745868A
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US2137133A
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US2017703A
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US2312491A
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US2286036A
Cited
US2294692A
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 |