Patent US2686294A successfully refreshed from Google Patents.
US2686294A
Expired / Lapsed
US
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Beat detector circuit
Assignee: United States Department of the Navy
•
Filing: 1946-04-03
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Granted: 1954-08-10
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Expires: 1966-04-03
Abstract
No abstract record available.
Inventors
- 👤 Paul A Hower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:30
CPC Classifications
G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1919803A
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US1966230A
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US2076361A
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US2254023A
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US2321315A
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US2295615A
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US2324077A
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US2337328A
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US2483311A
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US2393856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |