US3769160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutron absorbers
Assignee: United Kingdom Atomic Energy Authority
•
Filing: 1971-05-13
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Granted: 1973-10-30
•
Expires: 1991-05-13
Abstract
Abstract The use of nitrogen as a neutron absorber is applied by employing silicon nitride in a foamed or high density form. Materials having neutron absorption cross-sections higher than silicon nitride may be incorporated with the silicon nitride.
Inventors
- 👤 L Shepherd
- 👤 S Hosegood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/10; G21C7/24; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
16 words
The high temperature nuclear reactor according to claim 1 wherein said element comprises a control rod.
Claim 2
Dependent Claim
24 words
The high temperature nuclear reactor according to claim 2 wherein said ceramic body is enclosed in a nitrogen atmosphere within a gas tight container.
Claim 3
Dependent Claim
15 words
The high temperature nuclear reactor according to claim 3 wherein said ceramic body is porous.
Claim 4
Dependent Claim
21 words
The high temperature nuclear reactor according to claim 3 wherein said neutron absorber material comprises a nitride or carbide of boron.
Claim 5
Dependent Claim
29 words
The high temperature nuclear reactor according to claim 1 wherein said solid ceramic body includes a boron-containing material in an amount of from 1 to 30 percent by weight.
Claim 6
Dependent Claim
20 words
The high temperature nuclear reactor according to claim 1 wherein said ceramic body includes reinforcing filaments of a refractory metal.
Claim 7
Dependent Claim
23 words
The high temperature nuclear reactor according to claim 6 wherein said refractory metal is selected from the group consisting of molybdenum and tungsten.
Claim 8
Dependent Claim
16 words
The high temperature nuclear reactor according to claim 1 wherein said neutron absorber element comprises shielding.
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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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |