US2861775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular blades
Assignee: Power Jets Research and Development Ltd
•
Filing: 1954-05-24
•
Granted: 1958-11-25
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Whitehead Leslie Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3007; F01D5/12; F01D5/14; F01D5/147; F01D5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US902526A
Cited
GB190721756A
Cited
US943348A
Cited
US1035364A
Cited
FR731449A
Cited
US2047502A
Cited
US2559013A
Cited
US2656146A
Cited
US2631004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |