US3660075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CRUCIBLE COATING FOR PREPARATION OF U AND P ALLOYS CONTAINING Zr OR Hf
Assignee: United States Atomic Energy Commission
•
Filing: 1969-10-16
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Granted: 1972-05-02
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Expires: 1989-10-16
Abstract
Abstract A method of limiting adverse oxygen contamination in the preparation of uranium and plutonium alloys containing zirconium or hafnium, in which the metals are melted and alloyed in a graphite crucible coated with niobium carbide or yttrium oxide.
Inventors
- 👤 Delbert R Harbur
- 👤 John W Anderson
- 👤 Richard K Money
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
F; F27; F27B; F27B14/00; F27B14/08; F27B14/10; C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0286; C22B60/04; C22C; C22C1/00; C22C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2778730A
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US2548897A
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US2822260A
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US3017286A
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US3019102A
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US3109730A
Cited
US3138453A
Cited
US3264093A
Cited
US3443912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |