Patent US2859091A successfully refreshed from Google Patents.
US2859091A
Expired / Lapsed
US
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Recovery of uranium from pitchblende ores
Assignee: Individual
•
Filing: 1950-08-08
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Granted: 1958-11-04
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Expires: 1970-08-08
Abstract
No abstract record available.
Inventors
- 👤 Charles E Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:51
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0226; C22B60/0239; C22B60/0252; C22B60/026; C22B60/0278
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
A METHOD OF RECOVERING URANIUM FROM AN AQUEOUS NITRIC ACID SOLUTION CONTAINING EXTRANEOUS IMPURITIES, A MAJOR PORTION THEREOF CONSISTING OF LEAD, WHICH COMPRISES ADDING A SOLUBLE SULFATE TO SAID SOLUTION, SEPARATING THE RESULTING PRECIPITATE FROM THE RESULTING SUPERNATANT SOLUTION, ADDING AN ACID-SOLUBLE BARIUM SALT TO THE RESULTING SEPARATED SUPERNATANT SOLUTION, SEPARATING THE RESULTING PRECIPITATE FROM THE RESULTING SUPERNATANT SOLUTION, DISSOLVING A METAL NITRATE IN RELATIVELY HIGH CONCENTRATION IN THE RESULTING SEPARATED SUPERNATANT SOLUTION, CIRCULATING A STREAM OF A SUBSTANTIALLY WATER-IMMISCIBLE, SELECTIVE, ORGANIC SOLVENT IN A CLOSED PATH, CONTACTING SAID SOLVENT STREAM IN A PORTION OF ITS PATH WITH THE RESULTING SOLUTION SAID METAL NITRATE TO PREFERENTIALLY
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |