Patent US4612165A successfully refreshed from Google Patents.
US4612165A
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Ductile aluminide alloys for high temperature applications
Assignee: Lockheed Martin Energy Systems Inc
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Filing: 1983-12-21
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Granted: 1986-09-16
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Expires: 2003-12-21
Abstract
Abstract Improved Ni3Al alloys are provided by inclusion of boron, hafnium or zirconium, and in some species, iron.
Inventors
- 👤 Chain T. Liu
- 👤 James O. Stiegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:48
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/007
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
An alloy consisting essentially of sufficient nickel and aluminum to form Ni 3 Al, an amount of boron sufficient to promote ductility in the alloy and 0.3 to 1.5 atomic percent of an element selected from the group consisting of hafnium and zirconium.
Claim 2
Dependent Claim
43 words
An alloy consisting essentially of sufficient nickel and aluminum to form Ni 3 Al, an amount of boron sufficient to promote ductility in the alloy and 0.3 to 1.5 atomic percent of an element selected from the group consisting of hafnium and zirconium.
Claim 3
Dependent Claim
13 words
The alloy of claim 1 further including 6 to 12 atomic percent iron.
Claim 4
Dependent Claim
23 words
The alloy of claim 2 comprising about 19 to about 21.5 atomic percent aluminum and about 0.08 to about 0.3 atomic percent boron.
Claim 5
Dependent Claim
24 words
The alloy of claim 1 wherein the total concentration of aluminum and the element selected from said group is less than 24.5 atomic percent.
Claim 6
Dependent Claim
24 words
The alloy of claim 2 wherein the total concentration of aluminum and the element selected from said group is 22 atomic percent or less.
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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |