Patent US5366875A successfully refreshed from Google Patents.
Patent US3284549A successfully refreshed from Google Patents.
US3284549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear reactor fuel elements
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1964-12-11
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Granted: 1966-11-08
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Expires: 1984-12-11
Abstract
No abstract record available.
Inventors
- 👤 Ford Lionel Houston
- 👤 Ingleby Bryan Edward
- 👤 Hibbert Neil Silva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:18
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C01; C01B; C01B32/00; C01B32/90; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/626; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/80; C01P2004/82; C01P2006/00; C01P2006/10; C04B2111/00; C04B2111/00474; C04B2111/00862; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A METHOD OF PRODUCING HIGH INTEGRITY SPHEROIDS OF URANIUM CARBIDE HAVING AN OUTER COATING OF A SUBSTANTIALLY IMPERMEABLE REFRACTORY MATERIAL COMPRISING THE STEPS OF APPLYING AN INITIAL COATING OF PYROLYTIC CARBON, 5-20 MICRONS IN THICKNESS, ON SPHEROIDS OF URANIUM MONOCARBIDE AT A DEPOSITION TEMEPRATURE IN THE RANGE 1200*C. TO 1400* C. SUCH THAT REACTION BETWEEN THE APPLIED COATING OF PYROLYTIC CARBON AND THE URANIUM MONOCARBIDE SPHEROIDS DOES NOT TAKE PLACE BY A SUBSTANTIAL AMOUNT, FOLLOWED BY APPLICATION OF AN OUTER COATING ON THE PYROLYTIC CARBON COATED URANIUM MONOCARBIDE SPHEROIDS OF A SUBSTANTIALLY IMPERMEABLE REFRACTORY MATERIAL OF THE GROUP CONSISTING OF PYROLYTIC CARBON AND SILICON CARBIDE SAID OUTER COATING BEING APPLIED AT A TEMPERATURE IN THE RANGE 1500*C.-1800*C. SUCH THAT REACTION TAKES PLACE BETWEEN THE INITIAL COATING OF PYROLYTIC CARBON AND THE URANIUM MONOCARBIDE SPHEROIDS TO FORM URANIUM DICARBIDE SO THAT VIODAGE, IN THE FORM OF A GAP, IS PREODUCED BETWEEN THE SPHEROIDS AND THE OUTER COATING OF REFRACTORY MATERIAL.
Claim 2
Independent Claim
159 words
A METHOD OF PRODUCING HIGH INTEGRITY SPHEROIDS OF URANIUM CARBIDE HAVING AN OUTER COATING OF A SUBSTANTIALLY IMPERMEABLE REFRACTORY MATERIAL COMPRISING THE STEPS OF APPLYING AN INITIAL COATING OF PYROLYTIC CARBON, 5-20 MICRONS IN THICKNESS, ON SPHEROIDS OF URANIUM MONOCARBIDE AT A DEPOSITION TEMEPRATURE IN THE RANGE 1200*C. TO 1400* C. SUCH THAT REACTION BETWEEN THE APPLIED COATING OF PYROLYTIC CARBON AND THE URANIUM MONOCARBIDE SPHEROIDS DOES NOT TAKE PLACE BY A SUBSTANTIAL AMOUNT, FOLLOWED BY APPLICATION OF AN OUTER COATING ON THE PYROLYTIC CARBON COATED URANIUM MONOCARBIDE SPHEROIDS OF A SUBSTANTIALLY IMPERMEABLE REFRACTORY MATERIAL OF THE GROUP CONSISTING OF PYROLYTIC CARBON AND SILICON CARBIDE SAID OUTER COATING BEING APPLIED AT A TEMPERATURE IN THE RANGE 1500*C.-1800*C. SUCH THAT REACTION TAKES PLACE BETWEEN THE INITIAL COATING OF PYROLYTIC CARBON AND THE URANIUM MONOCARBIDE SPHEROIDS TO FORM URANIUM DICARBIDE SO THAT VIODAGE, IN THE FORM OF A GAP, IS PREODUCED BETWEEN THE SPHEROIDS AND THE OUTER COATING OF REFRACTORY MATERIAL.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |