Patent US3754902A successfully refreshed from Google Patents.
US3754902A
Expired / Lapsed
US
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Nickel base superalloy resistant to oxidation erosion
Assignee: RTX Corp
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Filing: 1968-06-05
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Granted: 1973-08-28
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Expires: 1988-06-05
Abstract
Abstract Nickel-base superalloys are described which oxidize selectively to form a single protective oxide Al2O3 which is particularly adherent to the alloy surface. Alloys of the nickel-chromiumaluminum type are disclosed in a basic chemistry corresponding to, by weight, 4-7 percent aluminum, 12-21 percent chromium, 1925 percent aluminum plus chromium, 0.01-0.5 percent yttrium or similar material, balance nickel with the usual alloying ingredients associated with the superalloys.
Inventors
- 👤 G Goward
- 👤 D Boone
- 👤 D Duhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:18
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/005; C; C22; C22C; C22C19/00; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
An alloy according to claim 1 also including, by weight: carbon 0.03-0.08 percent boron 0.01-0.02 percent zirconium 0.08-0.12 percent
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |