US2838370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of uranium and thorium from aqueous solutions
Assignee: Individual
•
Filing: 1952-04-09
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Granted: 1958-06-10
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Expires: 1972-04-09
Abstract
No abstract record available.
Inventors
- 👤 George D Calkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:02
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0247; B; B01; B01J; B01J41/00; B01J41/04; B01J41/05; C01; C01F; C01F15/00; C22B60/0252; C22B60/0265; C22B60/0278; C22B60/0291
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A PROCESS OF SEPARATING URANIUM VALUES FROM THORIUM VALUES CONTAINED IN AN AQUEOUS ALKALI CARBONATE SOLUTION COMPRISING THOROUGHLY CONTACTING SAID SOLUTION WITH A STRONG-BASE ANION EXCHANGE RESIN WHEREBY THE URANIUM VALUES ARE ADSORBED WHILE THE THORIUM VALUES REMAIN IN SOLUTION, AND SEPARATING THE URANIUM-CONTAINING RESIN FROM THE THORIUM-CONTAINING SOLUTION.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |