Patent US2787536A successfully refreshed from Google Patents.
US2787536A
Expired / Lapsed
US
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Process for melting and refining uranium
Assignee: Individual
•
Filing: 1946-12-03
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Granted: 1957-04-02
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Expires: 1966-12-03
Abstract
No abstract record available.
Inventors
- 👤 Frank H Spedding
- 👤 Harley A Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:41
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0213; Y; Y10; Y10S; Y10S266/00; Y10S266/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR CASTING URANIUM, COMPRISING INTRODUCING THE URANIUM INTO A MELTING CONTAINER AND RESTRICTING THE CONTACT OF THE URANIUM TO THAT WITH GRAPHITE SURFACE; HEATING THE URANIUM TO AT LEAST ITS MELTING POINT BUT TO A MAXIMUM OF 1650*C. WHEREBY URANIUM CARBIDE FORMED IS PREVENTED FROM DISSOLVING IN THE URANIUM AND RETAINED ON ITS SURFACE IN THE FORM OF A SKIN; AND SEPARATING THE URANIUM FROM SAID SKIN.
Claim 2
Dependent Claim
69 words
A PROCESS FOR CASTING URANIUM, COMPRISING INTRODUCING THE URANIUM INTO A MELTING CONTAINER AND RESTRICTING THE CONTACT OF THE URANIUM TO THAT WITH GRAPHITE SURFACE; HEATING THE URANIUM TO AT LEAST ITS MELTING POINT BUT TO A MAXIMUM OF 1650*C. WHEREBY URANIUM CARBIDE FORMED IS PREVENTED FROM DISSOLVING IN THE URANIUM AND RETAINED ON ITS SURFACE IN THE FORM OF A SKIN; AND SEPARATING THE URANIUM FROM SAID SKIN.
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |