Patent US3146584A successfully refreshed from Google Patents.
US3146584A
Expired / Lapsed
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Jet propulsion nozzle
Assignee: Rolls Royce PLC
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Filing: 1961-06-26
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Granted: 1964-09-01
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Smith Stanley Frank
- 👤 Craigie David
- 👤 Keenan John Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:49
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/52; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A JET PROPULSION NOZZLE ASSEMBLY ADAPTED FOR USE AT SUPERSONIC VELOCITIES COMPRISING A NOZZLE MEMBER HAVING A SUBSTANTIALLY RECTANGULAR DOWNSTREAM END, AND A BODY EXTENDING DOWNSTREAM OF THE NOZZLE MEMBER, SAID BODY BEING PROVIDED WITH MEANS HAVING A CONCAVE SURFACE WHICH CONSTITUTES A SMOOTHLY CURVED EXTENSION OF THE DOWNSTREAM END OF AN OUTER WALL OF THE NOZZLE MEMBER AND WHICH CONTROLS THE EXPANSION OF JET GASES DOWNSTREAM OF THE NOZZLE MEMBER, SAID NOZZLE MEMBER HAVING A LIP AT THE DOWNSTREAM END THEREOF DEFINING A THROAT THERE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |