Patent US2556873A successfully refreshed from Google Patents.
US2556873A
Expired / Lapsed
US
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Aircraft instrument responsive to yaw and angle of attack
Assignee: Kollsman Instrument Corp
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Filing: 1944-04-07
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Granted: 1951-06-12
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Expires: 1964-04-07
Abstract
No abstract record available.
Inventors
- 👤 Geisse John Harlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:40
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/02; G01C9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT54347B
Cited
US1183638A
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US1332810A
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US1360102A
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US1777282A
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FR604387A
Cited
US2055495A
Cited
US2027613A
Cited
GB416766A
Cited
US2277625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |