US3331748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear fuel elements
Assignee: Atomic Energy of Canada Ltd AECL
•
Filing: 1965-08-09
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Granted: 1967-07-18
•
Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 Melville A Feraday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:03
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/16; G21C3/20; G21C3/42; G21C3/58; G21C3/60; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A FUEL ELEMENT FOR NUCLEAR REACTORS COMPRISING: (A) AN INNER LAYER OF URANIUM METAL CONTAINING FROM 200 TO 500 P.P.M. IRON, FROM 500 TO 1200 P.P.M. ALUMINUM, AND BETA QUENCHED AND ALPHA ANNEALED TO REFINE AND RANDOMIZED THE GRAIN STRUCTURE, AND ENCLOSING A CENTRAL VOID SPACE, (B) A MIDDLE LAYER COMPRISING ONE OF (1) AN URANIUM ALLOY CONTAINING AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ZR, MO, NB AND AL, THE ZR BEING PRESENT IN FROM 30 TO 60 WT. PERCENT, THE MO AN NB IN FROM 1 TO 25 WT. PERCENT, AND THE AL IN FROM 50 TO 95 WT. PERCENT, AND (2) URANIUM DISPERSION-STRENGTHENED WITH ALUMINA, AND (C) AN OUTER SHEATH OF A CORROSION-RESISTANT ZIRCONIUM ALLOY.
Claim 2
Dependent Claim
119 words
A FUEL ELEMENT FOR NUCLEAR REACTORS COMPRISING: (A) AN INNER LAYER OF URANIUM METAL CONTAINING FROM 200 TO 500 P.P.M. IRON, FROM 500 TO 1200 P.P.M. ALUMINUM, AND BETA QUENCHED AND ALPHA ANNEALED TO REFINE AND RANDOMIZED THE GRAIN STRUCTURE, AND ENCLOSING A CENTRAL VOID SPACE, (B) A MIDDLE LAYER COMPRISING ONE OF (1) AN URANIUM ALLOY CONTAINING AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ZR, MO, NB AND AL, THE ZR BEING PRESENT IN FROM 30 TO 60 WT. PERCENT, THE MO AN NB IN FROM 1 TO 25 WT. PERCENT, AND THE AL IN FROM 50 TO 95 WT. PERCENT, AND (2) URANIUM DISPERSION-STRENGTHENED WITH ALUMINA, AND (C) AN OUTER SHEATH OF A CORROSION-RESISTANT ZIRCONIUM ALLOY.
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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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |