US2999391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-compensating gyro apparatus
Assignee: North American Aviation Corp
•
Filing: 1950-12-11
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Granted: 1961-09-12
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Expires: 1970-12-11
Abstract
No abstract record available.
Inventors
- 👤 Darwin L Freebairn
- 👤 John M Slater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:47
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/1225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190711040A
Cited
US1192468A
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US1560428A
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US1947562A
Cited
US1930082A
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GB599249A
Cited
US2414291A
Cited
US2591697A
Cited
US2524553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |