US4164420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master alloy for the preparation of zirconium alloys
Assignee: Ugine Aciers SA
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Filing: 1977-12-08
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Granted: 1979-08-14
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Expires: 1997-12-08
Abstract
Abstract The invention relates to a master alloy intended for the preparation of zirconium-base alloys and more particularly for the preparation of alloys such as those known as zircaloy 2 and zircaloy 4 useful for nuclear applications. This master alloy contains, by weight, from about 50 to 85% of Sn; 5 to 30% of Zr; 0 to 20% of Fe; and 0 to 20% Cr, with the combined Fe+Cr content being about 3 to 30%. This master alloy enables zirconium alloys to be produced in which the tin is distributed homogeneously.
Inventors
- 👤 Marcel Armand
- 👤 Daniel Charquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:08
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; C22C1/03; C22C13/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A zirconium containing master alloy for producing zirconium-based alloys, said master alloy comprising by weight alloying elements of a percentage by weight generally greater than that of the zirconium-based alloys to be produced, and consisting essentially of by weight about: Sn 50 to 85% Zr 5 to 30% Fe 0 to 20% Cr 0 to 20% the combined Fe+Cr content of which is between about 3 and about 30%.
Claim 2
Dependent Claim
69 words
A zirconium containing master alloy for producing zirconium-based alloys, said master alloy comprising by weight alloying elements of a percentage by weight generally greater than that of the zirconium-based alloys to be produced, and consisting essentially of by weight about: Sn 50 to 85% Zr 5 to 30% Fe 0 to 20% Cr 0 to 20% the combined Fe+Cr content of which is between about 3 and about 30%.
Claim 3
Dependent Claim
18 words
A master alloy for producing zirconium-based alloys essentially comprising by weight approximately: Sn 70%; Zr 20%; Fe 10%
Claim 4
Dependent Claim
18 words
A master alloy for producing zirconium-based alloys essentially comprising by weight approximately: Sn 70%; Zr 20%; Fe 10%
Claim 5
Dependent Claim
18 words
A master alloy for producing zirconium-based alloys essentially comprising by weight approximately: Sn 77%; Zr 17.5%; Fe 5.5%
Claim 6
Dependent Claim
18 words
A master alloy for producing zirconium-based alloys essentially comprising by weight approximately: Sn 77%; Zr 17.5%; Fe 5.5%
Claim 7
Dependent Claim
20 words
A master alloy for producing zirconium-based alloys essentially comprising by weight approximately: Sn 70%; Zr 20%; Fe 5%; Cr 5%.
Claim 8
Dependent Claim
20 words
A master alloy for producing zirconium-based alloys essentially comprising by weight approximately: Sn 70%; Zr 20%; Fe 5%; Cr 5%.
Claim 9
Dependent Claim
18 words
A master alloy for producing-zirconium based alloys essentially comprising by weight approximately: Sn 77%; Zr 17.5%; Cr 5.5%.
Claim 10
Dependent Claim
18 words
A master alloy for producing-zirconium based alloys essentially comprising by weight approximately: Sn 77%; Zr 17.5%; Cr 5.5%.
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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |