US2485331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for training aircraft personnel in radio navigation
Assignee: Link Aviation Inc
•
Filing: 1939-11-25
•
Granted: 1949-10-18
•
Expires: 1959-11-25
Abstract
No abstract record available.
Inventors
- 👤 Ahlert P Stuhrman
- 👤 Charles W Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:16
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2171561A
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US2164412A
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US2099857A
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US2179663A
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US2226726A
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US2288196A
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US2442297A
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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) | 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 |