Patent US3297903A successfully refreshed from Google Patents.
US2497961A
Expired / Lapsed
US
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Electrical measuring device
Assignee: Individual
•
Filing: 1946-01-17
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Granted: 1950-02-21
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Expires: 1966-01-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:29
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1438947A
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US1178772A
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GB266798A
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US1696415A
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US2046422A
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US2062915A
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US2279232A
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US2321605A
Cited
US2384167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |