Patent US3846154A successfully refreshed from Google Patents.
US3846154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nuclear fuel
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1971-12-07
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Granted: 1974-11-05
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Expires: 1991-12-07
Abstract
Abstract 1. A METHOD OF PREPARING NUCLEAR FUEL PARTICLES HAVING KERNELS OF OXIDE FUEL, COMPRISING THE STEPS OF PYROLYTICALLY DEPOSITING FIRST, SECOND AND THIRD COATINGS OF CARBON ONTO THE OXIDE FUEL KERRNELS FROM HYDROCARBON GAS, THE FIRST COATING BEING RELATIVELY THIN AND THE SECOND AND THIRD COATINGS RELATIVELY THICK, THE FIRST AND THIRD COATINGS BEING OF RELATIVELY HIGH DENSITY AND THE SECOND COATING BEING OF RELATIVELY LOW DENSITY AND POROUS, THE FIRST COATING BEING SUBSTANTIALLY IMPERMEABLE TO GASES DURING THE APPLICATION OF THE SECOND AND THRID COATINGS.
Inventors
- 👤 R Lefevre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:57
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/626; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF PREPARING NUCLEAR FUEL PARTICLES HAVING KERNELS OF OXIDE FUEL, COMPRISING THE STEPS OF PYROLYTICALLY DEPOSITING FIRST, SECOND AND THIRD COATINGS OF CARBON ONTO THE OXIDE FUEL KERRNELS FROM HYDROCARBON GAS, THE FIRST COATING BEING RELATIVELY THIN AND THE SECOND AND THIRD COATINGS RELATIVELY THICK, THE FIRST AND THIRD COATINGS BEING OF RELATIVELY HIGH DENSITY AND THE SECOND COATING BEING OF RELATIVELY LOW DENSITY AND POROUS, THE FIRST COATING BEING SUBSTANTIALLY IMPERMEABLE TO GASES DURING THE APPLICATION OF THE SECOND AND THRID COATINGS.
Claim 2
Independent Claim
85 words
A METHOD OF PREPARING NUCLEAR FUEL PARTICLES HAVING KERNELS OF OXIDE FUEL, COMPRISING THE STEPS OF PYROLYTICALLY DEPOSITING FIRST, SECOND AND THIRD COATINGS OF CARBON ONTO THE OXIDE FUEL KERRNELS FROM HYDROCARBON GAS, THE FIRST COATING BEING RELATIVELY THIN AND THE SECOND AND THIRD COATINGS RELATIVELY THICK, THE FIRST AND THIRD COATINGS BEING OF RELATIVELY HIGH DENSITY AND THE SECOND COATING BEING OF RELATIVELY LOW DENSITY AND POROUS, THE FIRST COATING BEING SUBSTANTIALLY IMPERMEABLE TO GASES DURING THE APPLICATION OF THE SECOND AND THRID COATINGS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |