Patent US3711936A successfully refreshed from Google Patents.
US3711936A
Expired / Lapsed
US
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Method for forming composite articles from alloy in temporary condition of superplasticity
Assignee: RTX Corp
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Filing: 1970-12-28
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Granted: 1973-01-23
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Expires: 1990-12-28
Abstract
Abstract Articles, including such gas turbine engine hardware as airfoils and discs, are formed by forging alloys in a temporary condition of low strength and high ductility around suitable supporting materials or shapes, and forming a composite by diffusion bonding. The supporting materials may be retained within the finished article to provide, for example, a filament strengthened composite or may subsequently be leached therefrom to form hollow hardware.
Inventors
- 👤 R Athey
- 👤 J Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:20
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/04; B23K20/02; B23K20/023; B32; B32B; B32B15/00; B32B15/01; B23K2103/00; B23K2103/02; B23K2103/04; B23K2103/05; B23K2103/08; B23K2103/14; B23K2103/16; B23K2103/166; B23K2103/172; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337; Y10T29/49801
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
22 words
The method according to claim 1 wherein: the composite is subsequently heat treated to harden the matrix material through a precipitation mechanism.
Claim 2
Dependent Claim
18 words
The method according to claim 1 wherein: the supporting material is subsequently selectively leached from the matrix alloy.
Claim 3
Dependent Claim
18 words
The method according to claim 3 wherein: the matrix alloy is heat treated to precipitate the hardening phases.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |