Patent US2939274A successfully refreshed from Google Patents.
US2939274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for varying a jet engine orifice
Assignee: North American Aviation Corp
•
Filing: 1954-01-04
•
Granted: 1960-06-07
•
Expires: 1974-01-04
Abstract
No abstract record available.
Inventors
- 👤 Gordon A Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:28
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1001290A
Cited
US1839672A
Cited
US2401496A
Cited
GB580995A
Cited
US2597253A
Cited
US2488174A
Cited
US2778190A
Cited
US2625008A
Cited
US2770944A
Cited
US2651172A
Cited
US2858668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |