US2519698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground trainer for aircraft personnel
Assignee: AT&T Inc
•
Filing: 1945-10-12
•
Granted: 1950-08-22
•
Expires: 1965-10-12
Abstract
No abstract record available.
Inventors
- 👤 Frank M Pearsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:11
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/16; G09B9/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1655244A
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US2164412A
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US2099857A
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US2218546A
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US2373313A
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US2366603A
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US2372741A
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US2346838A
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US2327997A
Cited
US2428767A
Cited
US2395477A
Cited
US2406221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |