US3719431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blades
Assignee: Rolls Royce PLC
•
Filing: 1970-09-25
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Granted: 1973-03-06
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Expires: 1990-09-25
Abstract
Abstract THIS DEVICE CONCERNS A HOLLOW GAS TURBINE ENGINE BLADE BEING PROVIDED WITH A SOLID METAL BLADE STUB, THE JOINT BETWEEN THE HOLLOW BLADE AND STUD BEING REINFORCED BY PROVIDING A REINFORCEMENT COLLAR WHICH IS ATTACHED TO BOTH THE STUB AND THE HOLLOW BLADE.
Inventors
- 👤 T Steele
- 👤 G Eccles
- 👤 D Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:51
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/04; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |