US3753794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlayer foil for diffusion bonding
Assignee: RTX Corp
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Filing: 1972-03-20
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Granted: 1973-08-21
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Expires: 1992-03-20
Abstract
Abstract For use in the diffusion bonding of the nickel-base superalloys, a normally brittle interlayer material significantly matched in composition to the superalloy is provided as a thin ductile foil of relatively low overall melting point.
Inventors
- 👤 D Paulonis
- 👤 D Duvall
- 👤 R Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/304; B23K35/001; B23K35/004; C; C22; C22C; C22C19/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222; Y10T428/12431; Y10T428/12438; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
An article according to claim 1 wherein: the article is foil having a thickness of 0.0005-0.005 inch.
Claim 2
Dependent Claim
33 words
An article according to claim 2 wherein: the nickel-base superalloys are of the gamma - gamma '' type having a combined aluminum plus titanium content in excess of about 6 percent by weight.
Claim 3
Dependent Claim
43 words
An article according to claim 3 wherein: the interlayer alloy also contains 10-35 percent of elements selected from the group consisting of cobalt, tungsten, tantalum and molybdenum with the concentration of each element, as included, approximating that of the superalloy to be bonded.
Claim 4
Dependent Claim
33 words
An article according to claim 3 wherein: the interlayer alloy has a melting point in excess of about 1, 930* F. but below the incipient melting point of the superalloy to be bonded.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |