US2662223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telemetering impedance bridge
Assignee: Fischer and Porter Co
•
Filing: 1949-07-22
•
Granted: 1953-12-08
•
Expires: 1969-07-22
Abstract
No abstract record available.
Inventors
- 👤 Brewer Nathaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:00
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01F1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1743852A
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US2070743A
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US2154156A
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GB501581A
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US2457727A
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US2363690A
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US2390463A
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US2407141A
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US2417292A
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US2420160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |