US3807993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel base alloy containing hafnium
Assignee: Avco Corp
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Filing: 1972-04-12
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Granted: 1974-04-30
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Expires: 1992-04-12
Abstract
Abstract The nickel base, cobalt containing alloys of this invention contain relatively small, but nonetheless significant, amounts of tungsten and molybdenum for solid solution strengthening, chromium for oxidation and sulfidation resistance, tantalum for solid solution and carbide strengthening, aluminum and titanium to enhance the strength by precipitation of a fine dispersed phase, gamma prime Ni3(A1, Ti), and hafnium for intermediate strength, ductility and improved oxidation resistance.
Inventors
- 👤 R Dalai
- 👤 J Walters
- 👤 B Ewing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:34
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/056
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
26 words
A nickel base alloy exhibiting high strength, ductility, sulfidation and oxidation resistance and stability at elevated temperature and consisting essentially of the following in weight percent:
Claim 2
Dependent Claim
26 words
A nickel base alloy exhibiting high strength, ductility, sulfidation and oxidation resistance and stability at elevated temperature and consisting essentially of the following in weight percent:
Claim 3
Dependent Claim
26 words
A nickel base alloy exhibiting, high strength, ductility, sulfidation and oxidation resistance and stability at elevated temperature and consisting essentially of the following in weight percent:
Claim 4
Dependent Claim
23 words
A nickel base alloy according to claim 1 which has been heat treated to produce a desired morphology of carbides and gamma prime.
Claim 5
Dependent Claim
9 words
An article formed of the alloy of claim 1.
Claim 6
Dependent Claim
11 words
A vacuum cast article consisting of the alloy of claim 1.
References Cited (Backward Citations)
US3677331A
Cited
US3677747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |