US2728633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of uranium and thorium compounds
Assignee: Individual
•
Filing: 1949-04-18
•
Granted: 1955-12-27
•
Expires: 1969-04-18
Abstract
No abstract record available.
Inventors
- 👤 Arden Thomas Victor
- 👤 Burstall Francis Hereward
- 👤 Linstead Reginald Patrick
- 👤 Wells Ronald Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:26
CPC Classifications
C; C01; C01F; C01F15/00; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/026
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A METHOD OF PURIFYING COMPOUNDS OF METALS OF THE GROUP CONSISTING OF URANIUM AND THORIUM WHEREIN AN IMPURE COMPOUND OF SUCH METAL IS EXTRACTED WITH AN ORGANIC SOLVENT OF THE GROUP CONSISTING OF DIETHYL ETHER, METHYL ACETATE, BUTYL ACETATE, METHYL ISOBUTYL KETONE AND NITRO METHANE CONTAINING A SMALL PROPORTION OF ACID, PASSING THE EXTRACT THROUGH AN ADSOBENT MASS OF A SUBSTANCE OF THE GROUP CONSISTING OF CELLULOSE, CELLULOSE ACETATE, ACTIVATED ALUMINA, CALCINED BALL CLAY, ALGINIC ACID AND ION EXCHANGE RESINS, AND COLLECTING A SOLUTION OF THE PURFIED COMPOUND OF THE METAL IN THE ORGANIC SOLVENT WHICH HAS PASSED THROUGH THE ADSORBENT MASS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |