US2812897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine engines
Assignee: Bristol Aeroplane Co Ltd
•
Filing: 1954-02-01
•
Granted: 1957-11-12
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Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Cameron Lachlan Mctavish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:54
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; F04D27/0215; F02; F02C; F02C7/00; F02C7/04; F02C7/047; F02C7/12; F02C7/16; F02C7/18; F02C7/185; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2657901A
Cited
US2620123A
Cited
US2636665A
Cited
US2599470A
Cited
US2639579A
Cited
US2718350A
Cited
US2680001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |