US3151037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encased fuel
Assignee: 3M Co
•
Filing: 1961-02-21
•
Granted: 1964-09-29
•
Expires: 1981-02-21
Abstract
No abstract record available.
Inventors
- 👤 James R Johnson
- 👤 Harold G Sowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:08
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/626; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S376/00; Y10S376/90; Y10S376/901; Y10S376/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A NUCLEAR FUEL PARTICLE, COMPRISING IN COMBINATION A SPHERULE OF A NORMALLY SOLID FISSIONABLE MATERIAL HAVING A SMOOTH, SUBSTANTIALLY SPHERICAL SURFACE AND COMPLETELY ENCASED IN A SPHERICAL SELF-SUPPORTING SHELL OF A SUBSTANTIALLY IMPERMEABLE REFRACTORY MATERIAL OF THE GROUP CONSISTING OF PYROLYTIC CARBON AND REFRACTORY METAL CARBIDES THE EXTERIOR DIAMETER OF SAID SHELL BEING UP TO ABOUT 200 MILS AND THE INTERIOR VOLUME ENCLOSED BY THE SAID SHELL BEING GREATER THAN THE VOLUME OF THE NON-GASEOUS PORTIONS OF THE SAID FISSIONABLE MATERIAL AT ALL TEMPERATURES BELOW THE MELTING POINT FO SAID REFRACTORY MATERIAL.
Claim 2
Dependent Claim
92 words
A NUCLEAR FUEL PARTICLE, COMPRISING IN COMBINATION A SPHERULE OF A NORMALLY SOLID FISSIONABLE MATERIAL HAVING A SMOOTH, SUBSTANTIALLY SPHERICAL SURFACE AND COMPLETELY ENCASED IN A SPHERICAL SELF-SUPPORTING SHELL OF A SUBSTANTIALLY IMPERMEABLE REFRACTORY MATERIAL OF THE GROUP CONSISTING OF PYROLYTIC CARBON AND REFRACTORY METAL CARBIDES THE EXTERIOR DIAMETER OF SAID SHELL BEING UP TO ABOUT 200 MILS AND THE INTERIOR VOLUME ENCLOSED BY THE SAID SHELL BEING GREATER THAN THE VOLUME OF THE NON-GASEOUS PORTIONS OF THE SAID FISSIONABLE MATERIAL AT ALL TEMPERATURES BELOW THE MELTING POINT FO SAID REFRACTORY MATERIAL.
References Cited (Backward Citations)
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US2782158A
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Cited
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Cited
US2879216A
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US2915815A
Cited
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Cited
US3010889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |