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US3025519A
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US
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Automatic radio navigation system
Assignee: Individual
•
Filing: 1948-11-03
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Granted: 1962-03-13
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Expires: 1968-11-03
Abstract
No abstract record available.
Inventors
- 👤 Carl W Brown
- 👤 Irving J Shepperd
- 👤 Frank D Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:03
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0011; F; F41; F41G; F41G7/00; F41G7/20; F41G7/30; G01; G01S; G01S1/00; G01S1/02; G01S11/00; G01S11/02; G01S11/10
Claims Analysis
Total Claims: 0
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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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |