US2684467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impedance bridge
Assignee: United States Department of the Navy
•
Filing: 1945-12-14
•
Granted: 1954-07-20
•
Expires: 1965-12-14
Abstract
No abstract record available.
Inventors
- 👤 Louis B Young
- 👤 Francis J Gaffney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1665325A
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US1816958A
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US2200819A
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US2243234A
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US2416790A
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US2369662A
Cited
US2461456A
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US2437449A
Cited
US2448336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |