Patent US3212988A successfully refreshed from Google Patents.
US3212988A
Expired / Lapsed
US
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Fuel element for nuclear reactors
Assignee: Individual
•
Filing: 1962-07-10
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Granted: 1965-10-19
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Ringot Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:19
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/16; G21C3/20; G21C3/06; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A FUEL ELEMENT FOR NUCLEAR REACTORS COOLED BY GASEOUS CIRCULATION AND OPERATED AT RELATIVELY HIGH TEMPERATURES COMPRISING A FUEL SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF URANIUM DIOXIDE AND URANIUM CARBIDE COVERED BY A FIRST SHEATH OF MATERIAL HAVING A LOW NEUTRONIC ABSORPTIONCAPACITY, GOOD CREEP RESISTANCE, MECHANICAL AND METALLURGICAL PROPERTIES COMPATIBLE WITH SAID FUEL SUBSTANCE AND BEING SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, ALUMINUM AND BERYLLIUM AND AN OUTER SHEATH SURROUNDING SAID INNER SHEATH BEING FORMED FROM A MATERIAL RESISTANT TO CORROSION BY THE GASEOUS COOLANT WHICH SURROUNDS SAID ELEMENT AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF AUSTENITIC STAINLESS STEEL, MOLYBDENUM REFRACTORY STEEL AND NICKEL CHROME REFRACTORY ALLOYS, SAID FIRST SHEATH BEING OF A THICKNESS OF 0.04 TO 0.08 INCH AND SAID SECOND SHEATH OF A THICKNESS NOT MORE THAN 0.004 INCH.
Claim 2
Dependent Claim
135 words
A FUEL ELEMENT FOR NUCLEAR REACTORS COOLED BY GASEOUS CIRCULATION AND OPERATED AT RELATIVELY HIGH TEMPERATURES COMPRISING A FUEL SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF URANIUM DIOXIDE AND URANIUM CARBIDE COVERED BY A FIRST SHEATH OF MATERIAL HAVING A LOW NEUTRONIC ABSORPTIONCAPACITY, GOOD CREEP RESISTANCE, MECHANICAL AND METALLURGICAL PROPERTIES COMPATIBLE WITH SAID FUEL SUBSTANCE AND BEING SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, ALUMINUM AND BERYLLIUM AND AN OUTER SHEATH SURROUNDING SAID INNER SHEATH BEING FORMED FROM A MATERIAL RESISTANT TO CORROSION BY THE GASEOUS COOLANT WHICH SURROUNDS SAID ELEMENT AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF AUSTENITIC STAINLESS STEEL, MOLYBDENUM REFRACTORY STEEL AND NICKEL CHROME REFRACTORY ALLOYS, SAID FIRST SHEATH BEING OF A THICKNESS OF 0.04 TO 0.08 INCH AND SAID SECOND SHEATH OF A THICKNESS NOT MORE THAN 0.004 INCH.
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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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |