Patent US3511576A successfully refreshed from Google Patents.
US3511576A
Expired / Lapsed
US
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Device for controlling the bleed of air from a gas turbine engine compressor
Assignee: Rolls Royce PLC
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Filing: 1967-09-22
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Granted: 1970-05-12
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Expires: 1987-09-22
Abstract
No abstract record available.
Inventors
- 👤 Karl Herbstritt
- 👤 Walter George Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:16
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; F04D27/023; F04D27/0215; F04D27/0223; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3266510A
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US3399739A
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US3407828A
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US3409037A
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US3393692A
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US3396631A
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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) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |