Patent US2564429A successfully refreshed from Google Patents.
US2564429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground trainer for aircraft personnel
Assignee: AT&T Inc
•
Filing: 1945-10-12
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Granted: 1951-08-14
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Expires: 1965-10-12
Abstract
No abstract record available.
Inventors
- 👤 Charles E Germanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:36
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)
US2099857A
Cited
US2218546A
Cited
US2450261A
Cited
US2372741A
Cited
US2327997A
Cited
US2439168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |