US3304056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine blades
Assignee: Hitachi Ltd
•
Filing: 1965-11-16
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Granted: 1967-02-14
•
Expires: 1985-11-16
Abstract
No abstract record available.
Inventors
- 👤 Sohma Akio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:07
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D25/00; F01D25/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A TURBINE BLADE INCLUDING AN EROSION RESISTANT ALLOY PLATE HAVING A PLURALITY OF GENERALLY PARALLEL GROOVES AND BEING RIGIDLY ATTACHED BY FUSION TO THE UPSTREAM END RADIALLY OUTWARD PORTION OF THE TURBINE BLADE SO THAT THE GROOVES EXTEND IN THE RADIAL DIRECTION OF THE TURBINE BLADE.
Claim 2
Dependent Claim
46 words
A TURBINE BLADE INCLUDING AN EROSION RESISTANT ALLOY PLATE HAVING A PLURALITY OF GENERALLY PARALLEL GROOVES AND BEING RIGIDLY ATTACHED BY FUSION TO THE UPSTREAM END RADIALLY OUTWARD PORTION OF THE TURBINE BLADE SO THAT THE GROOVES EXTEND IN THE RADIAL DIRECTION OF THE TURBINE BLADE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |