US2728518A
Expired / Lapsed
US
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Method and means for regulating characteristics of multi-stage axial-flow compressors
Assignee: Rolls Royce PLC
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Filing: 1951-02-21
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Granted: 1955-12-27
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Expires: 1971-02-21
Abstract
No abstract record available.
Inventors
- 👤 Wilde Geoffrey Light
- 👤 Mckenzie Archibald Bathgate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:33
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0246; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/56; F04D29/563
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1986709A
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FR851766A
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US2374342A
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US2382535A
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US2473329A
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US2500070A
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FR931548A
Cited
US2455251A
Cited
US2460778A
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US2477954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |