US2484819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio navigation system
Assignee: Unisys Corp
•
Filing: 1946-10-29
•
Granted: 1949-10-18
•
Expires: 1966-10-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas M Ferrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:56
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0202; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2043336A
Cited
US2299083A
Cited
US2390383A
Cited
US2415679A
Cited
US2419970A
Cited
US2382993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |