US2694263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument flying training goggles
Assignee: Individual
•
Filing: 1951-04-12
•
Granted: 1954-11-16
•
Expires: 1971-04-12
Abstract
No abstract record available.
Inventors
- 👤 Gerald C Francis
- 👤 Ned T Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:27
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB191016049A
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AT72947B
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US1844232A
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FR850963A
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US2172287A
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US2255197A
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US2270238A
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US2388574A
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US2393533A
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US2591752A
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US2475522A
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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) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |