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US2538843A
Expired / Lapsed
US
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Composite aircraft flight instrument
Assignee: Individual
•
Filing: 1946-06-03
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Granted: 1951-01-23
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Expires: 1966-06-03
Abstract
No abstract record available.
Inventors
- 👤 Mcguire J Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
G; G01; G01C; G01C23/00; G01C19/00; G01C19/02; G01C19/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US398713A
Cited
US1850640A
Cited
US1960241A
Cited
GB416766A
Cited
US2112704A
Cited
US2202987A
Cited
US2296032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |