Patent US2777059A successfully refreshed from Google Patents.
US2777059A
Expired / Lapsed
US
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Echo suppression beacons
Assignee: GTE Sylvania Inc
•
Filing: 1951-04-13
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Granted: 1957-01-08
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Expires: 1971-04-13
Abstract
No abstract record available.
Inventors
- 👤 Francis H Stites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:53
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/767
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US251393A
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US2261643A
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US2515187A
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US2515178A
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US2527474A
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US2577506A
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US2568750A
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US2534746A
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US2677763A
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US2499297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |