US2722801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust ducting arrangements for gas-turbine engines
Assignee: Rolls Royce PLC
•
Filing: 1950-05-15
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Granted: 1955-11-08
•
Expires: 1970-05-15
Abstract
No abstract record available.
Inventors
- 👤 Lombard Adrian Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:53
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/11; F02K1/78; F02K1/82; F02K1/822; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB588082A
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GB578010A
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GB587512A
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US2579114A
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US2597253A
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US2564042A
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US2493641A
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US2481330A
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US2591676A
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US2551229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |