Patent US2997710A successfully refreshed from Google Patents.
US2997710A
Expired / Lapsed
US
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Direction finder equipment
Assignee: Webcor Inc
•
Filing: 1957-06-10
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Granted: 1961-08-22
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Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 Leonard C Cotuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:53
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2257203A
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US2397128A
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US2478700A
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US2544653A
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US2489270A
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US2521423A
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US2487601A
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US2630526A
Cited
US2829365A
Cited
US2901748A
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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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |