US2646566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-type direction finder system
Assignee: United States, WAR, Secretary of
•
Filing: 1946-03-01
•
Granted: 1953-07-21
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 William D Mcguigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:19
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1892221A
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US2329199A
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US2202400A
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US2204052A
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US2282030A
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US2312799A
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US2403727A
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US2412320A
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US2412669A
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US2404238A
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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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |