US3318778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear fuel element
Assignee: Hitachi Ltd
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Filing: 1965-02-25
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Granted: 1967-05-09
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Expires: 1985-02-25
Abstract
No abstract record available.
Inventors
- 👤 Morita Takahiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:35
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/30; G21C3/32; G21C3/326; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A NUCLEAR FUEL ELEMENT FOR USE IN A HEAVY WATER MODERATED REACTOR CONTAINING LIGHT WATER OR AN ORGANIC COOLANT, COMPRISING A PRESSURE TUBE INTO WHICH SAID LIGHT WATER OR ORGANIC COOLANT IS INTRODUCED, A PLURALITY OF FUEL RODS CONTAINED WITHIN SAID PRESSURE TUBE, EACH OF SAID RODS COMPRISING A CLAD TUBE AND NUCLEAR FUEL MATERIAL HOUSE THEREIN, AND A PLURALITY OF HOLLOW TUBES CLOSED AT THE ENDS THEREOF, SAID HOLLOW TUBES BEING CONSTITUTED BY A MATERIAL HAVING A SMALL NEUTRON ABSORPTIVE CROSSSECTION AND BEING POSITIONED AT RANDOM BETWEEN SAID FUEL RODS WITHIN SAID PRESSURE TUBE TO DECREASE THE QUANTITY OF SAID LIGHT WATER OR ORGANIC COOLANT EMPLOYED WITHIN SAID PRESSURE TUBE.
Claim 2
Dependent Claim
111 words
A NUCLEAR FUEL ELEMENT FOR USE IN A HEAVY WATER MODERATED REACTOR CONTAINING LIGHT WATER OR AN ORGANIC COOLANT, COMPRISING A PRESSURE TUBE INTO WHICH SAID LIGHT WATER OR ORGANIC COOLANT IS INTRODUCED, A PLURALITY OF FUEL RODS CONTAINED WITHIN SAID PRESSURE TUBE, EACH OF SAID RODS COMPRISING A CLAD TUBE AND NUCLEAR FUEL MATERIAL HOUSE THEREIN, AND A PLURALITY OF HOLLOW TUBES CLOSED AT THE ENDS THEREOF, SAID HOLLOW TUBES BEING CONSTITUTED BY A MATERIAL HAVING A SMALL NEUTRON ABSORPTIVE CROSSSECTION AND BEING POSITIONED AT RANDOM BETWEEN SAID FUEL RODS WITHIN SAID PRESSURE TUBE TO DECREASE THE QUANTITY OF SAID LIGHT WATER OR ORGANIC COOLANT EMPLOYED WITHIN SAID PRESSURE TUBE.
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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |