US2690376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of pure uranium compounds from ores
Assignee: Individual
•
Filing: 1942-06-17
•
Granted: 1954-09-28
•
Expires: 1962-06-17
Abstract
No abstract record available.
Inventors
- 👤 James I Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:41
CPC Classifications
C; C01; C01G; C01G43/00; C01G43/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD OF OBTAINING HIGHLY PURIFIED U3O8 FROM A URANIUM CONTAINING ORE WHICH COMPRISES DIGESTING THE URANIUM CONTAINING ORE WITH NITRIC ACID TO PRODUCE URANYL NITRATE, EVAPORATING SAID DIGESTED ORE MASS TO DRYNESS, TREATING SAID DRIED ORE MASS WITH AN ALIPHATIC ETHER TO SELECTIVELY EXTRACT THE URANLY NITRATE THEREFROM, WASHING SAID ETHER EXTRACT WITH NOT MORE THAN 1% BY VOLUME OF WATER SEVERAL TIMES TO REMOVE IMPURITIES, SEPARATING THE PURIFIED ETHER LAYER SUCCES-
Claim 2
Independent Claim
73 words
A METHOD OF OBTAINING HIGHLY PURIFIED U3O8 FROM A URANIUM CONTAINING ORE WHICH COMPRISES DIGESTING THE URANIUM CONTAINING ORE WITH NITRIC ACID TO PRODUCE URANYL NITRATE, EVAPORATING SAID DIGESTED ORE MASS TO DRYNESS, TREATING SAID DRIED ORE MASS WITH AN ALIPHATIC ETHER TO SELECTIVELY EXTRACT THE URANLY NITRATE THEREFROM, WASHING SAID ETHER EXTRACT WITH NOT MORE THAN 1% BY VOLUME OF WATER SEVERAL TIMES TO REMOVE IMPURITIES, SEPARATING THE PURIFIED ETHER LAYER SUCCES-
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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |