Patent US2692984A successfully refreshed from Google Patents.
US2692984A
Expired / Lapsed
US
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Bridge obstruction marker for radar navigation
Assignee: Unisys Corp
•
Filing: 1950-08-30
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Granted: 1954-10-26
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Expires: 1970-08-30
Abstract
No abstract record available.
Inventors
- 👤 Seymour B Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:45
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/75; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2539511A
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US2471419A
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US2537139A
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US2510299A
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US2463474A
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US2518383A
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US2572088A
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US2548655A
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US2596190A
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US2534271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |