US3420056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control system for a gas turbine engine
Assignee: Rolls Royce PLC
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Filing: 1967-02-17
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Granted: 1969-01-07
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Expires: 1987-02-17
Abstract
No abstract record available.
Inventors
- 👤 Keith Eames
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
F; F02; F02K; F02K3/00; F02C; F02C9/00; F02C9/16; G; G01; G01M; G01M15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |