US4963323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly corrosion-resistant zirconium alloy for use as nuclear reactor fuel cladding material
Assignee: Mitsubishi Metal Corp
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Filing: 1989-01-23
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Granted: 1990-10-16
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Expires: 2009-01-23
Abstract
Abstract A corrosion resistant zirconium alloy for use as a nuclear reactor cladding material. This alloy consists essentially of, on a weight % basis 0.02-1.15% Sn, 0.19-0.6% Fe, 0.07-0.4% Cr, and optionally 0.05 to not more than 0.5% Nb, the balance being Zr and incidental impurities, provided that the content of the nitrogen in the form of incidental impurities is no more than 60 ppm.
Inventors
- 👤 Yutaka Matsuo
- 👤 Yoshitaka Suda
- 👤 Nobuo Suda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:15
CPC Classifications
C; C22; C22C; C22C16/00; G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; G21C3/07; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S376/00; Y10S376/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
A corrosion resistant zirconium alloy for uses as a nuclear reactor fuel cladding material consisting essentially of on a weight % basis 0.2-1.15% Sn, 0.19-0.6% Fe, 0.07-0.4% Cr, the balance being Zr and incidental impurities, provided that the content of nitrogen in the form of incidental impurities is no more than 60 ppm.
Claim 2
Dependent Claim
53 words
A corrosion resistant zirconium alloy for uses as a nuclear reactor fuel cladding material consisting essentially of on a weight % basis 0.2-1.15% Sn, 0.19-0.6% Fe, 0.07-0.4% Cr, the balance being Zr and incidental impurities, provided that the content of nitrogen in the form of incidental impurities is no more than 60 ppm.
Claim 3
Dependent Claim
15 words
The zirconium alloy of claim 1, further comprising from 0.05 to less than 0.5% Nb.
Claim 4
Dependent Claim
18 words
The zirconium alloy of claim 2, wherein the Fe content is 0.19-0.24% and the Cr content is 0.07-0.13%.
Claim 5
Dependent Claim
18 words
The zirconium alloy of claim 1, wherein the Fe content is 0.19-0.24% and the Cr content is 0.07-0.13%.
References Cited (Backward Citations)
GB767892A
Cited
US3121034A
Cited
FR1408152A
Cited
US4584030A
Cited
JPS6036640A
Cited
US4649023A
Cited
US4810461A
Cited
US4814136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |