Patent US2873576A successfully refreshed from Google Patents.
US2873576A
Expired / Lapsed
US
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Means for controlling the rotational speed of the low-pressure compressor rotor of gas turbine engines
Assignee: Rolls Royce PLC
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Filing: 1953-01-30
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Granted: 1959-02-17
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Expires: 1973-01-30
Abstract
No abstract record available.
Inventors
- 👤 Lombard Adrian Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:40
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/15; F02C; F02C9/00; F02C9/16; G; G01; G01G; G01G23/00; G01G23/14
Claims Analysis
Total Claims: 0
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |