Patent US2506949A successfully refreshed from Google Patents.
US2506949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground trainer for training aircraft crew members
Assignee: AT&T Inc
•
Filing: 1946-06-25
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Granted: 1950-05-09
•
Expires: 1966-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Burelbach
- 👤 Joseph J Lukacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:49
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)
US1960350A
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US2099857A
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US2218546A
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US2308566A
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US2343945A
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US2332523A
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US2366603A
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US2372741A
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US2327997A
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US2428767A
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US2406836A
Cited
US2395477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |