Patent US2939522A successfully refreshed from Google Patents.
US2939522A
Expired / Lapsed
US
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Fuel systems of gas turbine engines
Assignee: Rolls Royce PLC
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Filing: 1955-07-18
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Granted: 1960-06-07
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Morley Frederick Willia Walton
- 👤 Basford Kenneth Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:55
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/22; F02C9/00; F02C9/26; F02C9/263; F02C9/28; F05; F05D; F05D2270/00; F05D2270/01; F05D2270/02; F05D2270/021; F05D2270/30; F05D2270/301; F05D2270/3015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2429005A
Cited
GB580149A
Cited
GB647585A
Cited
US2670599A
Cited
GB677006A
Cited
US2750734A
Cited
US2759549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |