US2769977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position indicating apparatus for use with radio navigation systems
Assignee: Decca Record Co Ltd
•
Filing: 1950-02-27
•
Granted: 1956-11-06
•
Expires: 1970-02-27
Abstract
No abstract record available.
Inventors
- 👤 Roberts Graham Estyn
- 👤 Copping John Basil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:53
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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US2419576A
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US2561345A
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US2530428A
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US2569328A
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US2534820A
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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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |