US2471439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for simulating runway localizer and glide path beams for training purposes
Assignee: Individual
•
Filing: 1945-11-14
•
Granted: 1949-05-31
•
Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Grant C Melvin
- 👤 Peter C Jones
- 👤 Stanley B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:50
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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US2454503A
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US2332523A
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US2326764A
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US2366603A
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US2346693A
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US2358793A
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US2445673A
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US2450240A
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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) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |