Patent US2945741A successfully refreshed from Google Patents.
US2945741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of uranium values
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1956-04-03
•
Granted: 1960-07-19
•
Expires: 1976-04-03
Abstract
No abstract record available.
Inventors
- 👤 Stedman Ronald Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:23
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/0278; C22B60/0221; C22B60/0226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN A PROCESS FOR THE RECOVERY OF URANIUM VALUE FROM ROCK PHOSPHATE WHICH HAS BEEN OPENED UP WITH A REACTANT CONSISTING ESSENTIALLY OF A MINERAL ACID AND IN WHICH THE RESULTING REACTION MIXTURE HAS BEEN NEUTRALIZED TO A PH VALUE IN THE RANGE OF 3.5 TO 5.0, THE FURTHER AND SUBSEQUENT STEP OF PRECIPITATING URANIUM VALUES IN THE PRESENCE OF AN INORGANIC FILTER AID, BY MEANS OF A REDUCING AGENT CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOUND:
Claim 2
Dependent Claim
76 words
IN A PROCESS FOR THE RECOVERY OF URANIUM VALUE FROM ROCK PHOSPHATE WHICH HAS BEEN OPENED UP WITH A REACTANT CONSISTING ESSENTIALLY OF A MINERAL ACID AND IN WHICH THE RESULTING REACTION MIXTURE HAS BEEN NEUTRALIZED TO A PH VALUE IN THE RANGE OF 3.5 TO 5.0, THE FURTHER AND SUBSEQUENT STEP OF PRECIPITATING URANIUM VALUES IN THE PRESENCE OF AN INORGANIC FILTER AID, BY MEANS OF A REDUCING AGENT CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOUND:
References Cited (Backward Citations)
US2789879A
Cited
US2743156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |