Patent US2616640A successfully refreshed from Google Patents.
US2616640A
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US
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Radio navigation system
Assignee: AC Cossor Ltd
•
Filing: 1945-03-22
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Granted: 1952-11-04
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Expires: 1965-03-22
Abstract
No abstract record available.
Inventors
- 👤 Bedford Leslie Herbert
- 👤 Jofeh Lionel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:11
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/24; G; G05; G05D; G05D1/00; G05D1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2210651A
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US2165800A
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US2260315A
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US2448007A
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US2417248A
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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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |