US2671970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flight trainer
Assignee: Individual
•
Filing: 1944-10-21
•
Granted: 1954-03-16
•
Expires: 1964-10-21
Abstract
No abstract record available.
Inventors
- 👤 Otto H Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2314497A
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US2442297A
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US2271296A
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US2313480A
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GB548093A
Cited
US2326764A
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US2298305A
Cited
US2366603A
Cited
US2352101A
Cited
US2385095A
Cited
US2385291A
Cited
US2443604A
Cited
US2406751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |