Patent US2490167A successfully refreshed from Google Patents.
US2490167A
Expired / Lapsed
US
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Electrical bridge measuring system
Assignee: Hartford National Bank and Trust Co
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Filing: 1945-10-11
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Granted: 1949-12-06
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Expires: 1965-10-11
Abstract
No abstract record available.
Inventors
- 👤 Storm Andre Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:55
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/10; G01R17/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1665397A
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US1847127A
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US2255771A
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US2252301A
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US2264197A
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US2208254A
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US2237950A
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US2290559A
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US2300198A
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US2418284A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |