US3349152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a sintered uranium dioxide nuclear fuel element containing a boride
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1965-03-06
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Granted: 1967-10-24
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Expires: 1985-03-06
Abstract
No abstract record available.
Inventors
- 👤 Watanabe Takaaki
- 👤 Ogura Tadashi
- 👤 Kondo Yoshiaki
- 👤 Nagasawa Masaji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/623; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD OF PRODUCING SINTERED COMPOSITE NUCLEAR FUEL ELEMENTS COMPRISING FORMING A MIXTURE OF URANIUM DIOXIDE AND A BORIDE SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM BORID, TITANIUM BORIDE AND MOLYBDENUM BORIDE AND AN ORGANIC FORMING AGENT SELECTED FROM THE GROUP CONSISTING OF PARAFFIN, POLYBUTENE AND POLYISOBUTYLENE AND A HYDROCARBON SOLVENT FOR THE FORMING AGENT INTO A MEMBER, MAINTAINING THE MEMBER IN AN ATMOSPHERE HYDROGEN AT A TEMPERATURE OF ABOUT THE BOILING POINT OF THE FORMING AGENT FOR MORE THAN 10 HOURS TO REMOVE THE FORMING AGENT AND TO PRELIMINARILY SINTERED MEMBER, EXPOSING THE PRELIMINARYLY SINTERED MEMBER TO A VACUUM HAVING AN ABSOLUTE PRESSURE NO GREATER THAN 10**-4MM. HG WITHOUT EXPOSING THE PRELIMINARILY SINTERED MEMBER TO AIR, HEATING THE PRELININARILY SINTERED MEMBER IN THE VACUUM TO A TEMPERATURE ABOUT 1300*C. AND MAINTAINING THE MEMBER AT THAT TEMPERATURE FOR A TIME SUFFICIENT TO COMPLETE THE SINTERING.
Claim 2
Independent Claim
145 words
A METHOD OF PRODUCING SINTERED COMPOSITE NUCLEAR FUEL ELEMENTS COMPRISING FORMING A MIXTURE OF URANIUM DIOXIDE AND A BORIDE SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM BORID, TITANIUM BORIDE AND MOLYBDENUM BORIDE AND AN ORGANIC FORMING AGENT SELECTED FROM THE GROUP CONSISTING OF PARAFFIN, POLYBUTENE AND POLYISOBUTYLENE AND A HYDROCARBON SOLVENT FOR THE FORMING AGENT INTO A MEMBER, MAINTAINING THE MEMBER IN AN ATMOSPHERE HYDROGEN AT A TEMPERATURE OF ABOUT THE BOILING POINT OF THE FORMING AGENT FOR MORE THAN 10 HOURS TO REMOVE THE FORMING AGENT AND TO PRELIMINARILY SINTERED MEMBER, EXPOSING THE PRELIMINARYLY SINTERED MEMBER TO A VACUUM HAVING AN ABSOLUTE PRESSURE NO GREATER THAN 10**-4MM. HG WITHOUT EXPOSING THE PRELIMINARILY SINTERED MEMBER TO AIR, HEATING THE PRELININARILY SINTERED MEMBER IN THE VACUUM TO A TEMPERATURE ABOUT 1300*C. AND MAINTAINING THE MEMBER AT THAT TEMPERATURE FOR A TIME SUFFICIENT TO COMPLETE THE SINTERING.
References Cited (Backward Citations)
US3051566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |