US3433244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable area duct
Assignee: Bristol Siddeley Engines Ltd
•
Filing: 1967-04-20
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Granted: 1969-03-18
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Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Terence Edward Gouven Gardiner
- 👤 John Rodney Dyson Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:59
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/08; F02K1/085; B; B64; B64C; B64C9/00; B64C9/38; F02K1/002; F02K1/004; Y; Y10; Y10T; Y10T137/00; Y10T137/3367; Y10T137/3476; Y10T137/8593; Y10T137/87265; Y10T137/8741
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3032976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |