US3711337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Columnar-grained nickel-base superalloy castings
Assignee: RTX Corp
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Filing: 1970-12-16
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Granted: 1973-01-16
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Expires: 1990-12-16
Abstract
Abstract The mechanical properties of columnar-grained nickel-base superalloy castings are improved by the addition of 1.5-3.5 weight percent hafnium to the alloy composition.
Inventors
- 👤 C Sullivan
- 👤 D Duhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:00
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/057
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
A casting according to claim 1 wherein the hafnium content is about 2 percent by weight.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |