Patent US2975632A successfully refreshed from Google Patents.
US2975632A
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US
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Ducted nozzle testing apparatus
Assignee: North American Aviation Corp
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Filing: 1957-06-04
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Granted: 1961-03-21
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Expires: 1977-06-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Ganahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:11
CPC Classifications
F; F01; F01D; F01D21/00; F01D21/003; F02; F02C; F02C7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2357625A
Cited
US2618925A
Cited
US2592322A
Cited
US2763155A
Cited
US2684690A
Cited
GB714169A
Cited
US2791240A
Cited
US2805571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |