US3559274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the sheathing of tubular nuclear fuel elements
Assignee: SnamProgetti SpA
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Filing: 1966-08-03
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Granted: 1971-02-02
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Expires: 1986-08-03
Abstract
Abstract A TUBULAR NUCLEAR FUEL ELEMENT IS GIVEN AN INTERNAL SHEATING BY THRUSTING A PIPE, SHRUNK BY COOLING, INTO THE ELEMENT AND THEN RAISING THE TEMPERATURE OF THE PIPE TO ROOM TEMPERATURE SO THAT IT EXPANDS AND PASSES TIGHTLY AGAINST THE INNER WALL OF THE FUEL ELEMENT, AND THERE AFTER THE SHEATING IS HEATED INTERNALLY AND THE FUEL ELEMENT IS COOLED EXTERNALLY TO CAUSE INTER-DIFFUSION AT THE INTERFACE BETWEEN THE SHEATHING MATERIAL AND THE FUEL ELEMENT WITHOUT ESTABLISHING PREFERENTIAL CRYSTALLINE ORIENTATIONS IN THE FUEL.
Inventors
- 👤 Saverio Granata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:31
CPC Classifications
G; G21; G21C; G21C21/00; G21C21/02; G21C21/08; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |