US3930787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintering furnace with hydrogen carbon dioxide atmosphere
Assignee: General Electric Co
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Filing: 1974-03-11
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Granted: 1976-01-06
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Expires: 1994-03-11
Abstract
Abstract A heated furnace for sintering structures of uranium oxide containing composition being introduced to the furnace. The furnace receives an atmosphere comprising a mixture of hydrogen and carbon dioxide as initially introduced to the furnace, and this mixture reacts in the furnace to give the presence of water vapor and carbon monoxide.
Inventors
- 👤 William R. DeHollander
- 👤 Yogesh Nivas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:46
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/1003; B22F3/1007; C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; F; F27; F27B; F27B9/00; F27B9/04; F27B9/045; F27B9/14; F27B9/20; F27B9/26; G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/623; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02P; Y02P10/00; Y02P10/10; Y02P10/122
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
An enclosed heated sintering furnace for controlling the partial pressure of oxygen in the furnace and for removing impurities from structures of uranium oxide containing compositions being sintered in the furnace, the furnace having means for introducing an atmosphere comprising a mixture of hydrogen and carbon dioxide as initially introduced to the furnace and the furnace having means for passing the structures countercurrently to the atmosphere.
Claim 2
Dependent Claim
66 words
An enclosed heated sintering furnace for controlling the partial pressure of oxygen in the furnace and for removing impurities from structures of uranium oxide containing compositions being sintered in the furnace, the furnace having means for introducing an atmosphere comprising a mixture of hydrogen and carbon dioxide as initially introduced to the furnace and the furnace having means for passing the structures countercurrently to the atmosphere.
Claim 3
Dependent Claim
29 words
An enclosed heated sintering furnace according to claim 1 in which there is from about 0.5 to about 90 percent hydrogen by volume and the balance is carbon dioxide.
Claim 4
Dependent Claim
29 words
An enclosed heated sintering furnace according to claim 1 in which there is from about 2 to about 20 percent hydrogen by volume and the balance is carbon dioxide.
Claim 5
Dependent Claim
19 words
An enclosed heated sintering furnace according to claim 1 in which the atmosphere has in addition a carrier gas.
Claim 6
Dependent Claim
16 words
An enclosed heated sintering furnace according to claim 1 in which the carrier gas is nitrogen.
Claim 7
Dependent Claim
16 words
An enclosed heated sintering furnace according to claim 1 in which the carrier gas is argon.
Claim 8
Dependent Claim
29 words
An enclosed heated sintering furnace according to claim 1 in which the hydrogen in the atmosphere is from dissociated ammonia and the atmosphere has a carrier gas of nitrogen.
Claim 9
Dependent Claim
30 words
An enclosed heated sintering furnace according to claim 1 in which the interior of the furnace is maintained at a temperature in the range of about 900° to about 1,500°C.
Claim 10
Dependent Claim
23 words
An enclosed heated sintering furnace according to claim 1 in which the furnace has therein structures comprised of uranium oxide with fluoride impurities.
Claim 11
Dependent Claim
23 words
An enclosed heated sintering furnace according to claim 1 in which the furnace has therein structures comprised of uranium dioxide with fluoride impurities.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |