US3346676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of ceramic nuclear fuel elements
Assignee: Hitachi Ltd
•
Filing: 1964-10-28
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Granted: 1967-10-10
•
Expires: 1984-10-28
Abstract
No abstract record available.
Inventors
- 👤 Hirose Yasuo
- 👤 Takeda Seiji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:17
CPC Classifications
G; G21; G21C; G21C21/00; G21C21/02; G21C21/04; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF MANUFACTURING METAL CLAD NON-SINTERED CERAMIC POWDER NUCLEAR FUEL ELEMENTS OF GREAT DENSITY FROM A METALLIC CLADDING TUBE AND CERAMIC NUCLEAR FUEL POWDER WHEREIN THE CERAMIC NUCLEAR FUEL POWDER IS PLACED IN THE METAL CLADDING TUBE AND COMPACTED THEREIN BY VIBRATION, THE IMPROVEMENT COMPRISING SUBJECTING THE INNER PARTS OF THE METAL CLADDING TUBE INCLUDING THE CERAMIC NUCLEAR FUEL POWDER TO EVACUATION WHILE HEATING THE SAME TO A TEMPERATURE BELOW THE SINTERING TEMPERATURE OF THE CERAMIC NUCLEAR FUEL POWDER AND CONCURRENTLY COMPACTING THE POWDER IN THE METAL CLAD TUBE BY VIBRATION.
Claim 2
Independent Claim
92 words
THE METHOD OF MANUFACTURING METAL CLAD NON-SINTERED CERAMIC POWDER NUCLEAR FUEL ELEMENTS OF GREAT DENSITY FROM A METALLIC CLADDING TUBE AND CERAMIC NUCLEAR FUEL POWDER WHEREIN THE CERAMIC NUCLEAR FUEL POWDER IS PLACED IN THE METAL CLADDING TUBE AND COMPACTED THEREIN BY VIBRATION, THE IMPROVEMENT COMPRISING SUBJECTING THE INNER PARTS OF THE METAL CLADDING TUBE INCLUDING THE CERAMIC NUCLEAR FUEL POWDER TO EVACUATION WHILE HEATING THE SAME TO A TEMPERATURE BELOW THE SINTERING TEMPERATURE OF THE CERAMIC NUCLEAR FUEL POWDER AND CONCURRENTLY COMPACTING THE POWDER IN THE METAL CLAD TUBE BY VIBRATION.
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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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |