US2840986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
After-burner fuel supply system for gas-turbine engines
Assignee: Rolls Royce PLC
•
Filing: 1953-04-13
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Granted: 1958-07-01
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Davies David Omri
- 👤 Jones John Sutcliffe
- 👤 Oulianoff George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:43
CPC Classifications
F; F02; F02K; F02K1/00; 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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US2693674A
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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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |