Patent US3290880A successfully refreshed from Google Patents.
US3290880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion equipment for a gas turbine engine
Assignee: Rolls Royce PLC
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Filing: 1965-01-15
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Granted: 1966-12-13
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Expires: 1985-01-15
Abstract
No abstract record available.
Inventors
- 👤 Poyser John Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:44
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
COMBINATION EQUIPMENT FOR A GAS TURBINE ENGINE COMPRISING: AN ELONGATED FLAME TUBE; DUCTING, INCLUDING PRIMARY, SECONDARY AND DILUTION AIR DUCTS EXTENDING ALONG THE OUTER SIDE ONLY OF AND COMMUNICATING WITH SAID FLAME TUBE AND THROUGH WHICH COMBUSTION AIR AND DILUTION AIR MAY FLOW; AND MEANS FOR INTRODUCING COMBUSTION AIR AND DILUTION AIR INTO SAID FLAME TUBE TRANSVERSELY THEREOF FROM SAID DUCTING.
Claim 2
Dependent Claim
61 words
COMBINATION EQUIPMENT FOR A GAS TURBINE ENGINE COMPRISING: AN ELONGATED FLAME TUBE; DUCTING, INCLUDING PRIMARY, SECONDARY AND DILUTION AIR DUCTS EXTENDING ALONG THE OUTER SIDE ONLY OF AND COMMUNICATING WITH SAID FLAME TUBE AND THROUGH WHICH COMBUSTION AIR AND DILUTION AIR MAY FLOW; AND MEANS FOR INTRODUCING COMBUSTION AIR AND DILUTION AIR INTO SAID FLAME TUBE TRANSVERSELY THEREOF FROM SAID DUCTING.
References Cited (Backward Citations)
US2977760A
Cited
US3055179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |