US3564689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a turbine blade having a leading edge formed of weld metal
Assignee: Gebrueder Boehler and Co AG
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Filing: 1968-05-27
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Granted: 1971-02-23
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Expires: 1988-05-27
Abstract
Abstract THE PRODUCTION OF TURBINE BLADES IN WHICH A BLADE BLANK IS PROVIDED IN THE AREA OF THE INLET EDGE WITH A STEEL WELD PORTION, WHICH, AFTER SMOOTHING OF ANY UNEVEN SPOTS, IS SHAPED TOGETHER WITH THE BLADE BODY TO THE FINAL DIMENSIONS IN A DROP FORGE AND FINALLY SUBJECTED TO HEAT TREATMENT.
Inventors
- 👤 Julius Hirtenlechner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:54
CPC Classifications
B; B23; B23F; B23F15/00; B23F15/04; B23P; B23P15/00; B23P15/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337; Y10T29/4998; Y10T29/49988
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |