US2754347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for refining rare refractory metals
Assignee: Individual
•
Filing: 1944-04-28
•
Granted: 1956-07-10
•
Expires: 1964-04-28
Abstract
No abstract record available.
Inventors
- 👤 Wroughton Donald
- 👤 John W Marden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:14
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0286; C22B60/0213; Y; Y10; Y10S; Y10S266/00; Y10S266/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN APPARATUS FOR REFINING URANIUM OF THE LIKE IN A FUSED SALT BATH, A GRAPHINE CRUCIBLE AND A GRAPHITE INSERT IN THE BOTTOM OF SAID CRUCIBLE, SAID INSERT HAVING A SLOPING UPPER SURFACE PROVIDING A POOL OF CROSS SECTIONAL AREA LESS THAN THE CROSS SECTIONAL AREA FO SAID CRUCIBLE FOR THE COLLECTION OF COALESCENT URANIUM OR THE LIKE UNDER A FUSED SALT BATH CONTAINED IN SAID CRUCIBLE.
Claim 2
Dependent Claim
67 words
IN APPARATUS FOR REFINING URANIUM OF THE LIKE IN A FUSED SALT BATH, A GRAPHINE CRUCIBLE AND A GRAPHITE INSERT IN THE BOTTOM OF SAID CRUCIBLE, SAID INSERT HAVING A SLOPING UPPER SURFACE PROVIDING A POOL OF CROSS SECTIONAL AREA LESS THAN THE CROSS SECTIONAL AREA FO SAID CRUCIBLE FOR THE COLLECTION OF COALESCENT URANIUM OR THE LIKE UNDER A FUSED SALT BATH CONTAINED IN SAID CRUCIBLE.
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |