Patent US2859156A successfully refreshed from Google Patents.
US2859156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic preparation of uf4
Assignee: Individual
•
Filing: 1957-11-14
•
Granted: 1958-11-04
•
Expires: 1977-11-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Allen
- 👤 Roger W Anderson
- 👤 Edward W Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:44
CPC Classifications
C; C01; C01G; C01G43/00; C01G43/04; C01G43/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD OF CONVERTING HEXAVALENT URANIUM TO UF4 WHICH COMPRISES SUBJECTING URNYL IONS TO CATHODIC REDUCTION AT A TEMPERATURE OF AT LEAST APPROXIMATELY 90* C. IN AN ELECTROLYTIC CELL CONTAINING AS ELECTROLYTIC AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID, SEPARATING THE RESULTING UF4.0.75H2O PERCIPITATE FROM THE RESULTANT SUPERNTANT LIQUID AND HEATING SAID PERCIPITANT UNTIL SUBSTANTIALLY COMPLETE DEHYDRATION TO UF4 IS EFFECTED.
Claim 2
Independent Claim
60 words
A METHOD OF CONVERTING HEXAVALENT URANIUM TO UF4 WHICH COMPRISES SUBJECTING URNYL IONS TO CATHODIC REDUCTION AT A TEMPERATURE OF AT LEAST APPROXIMATELY 90* C. IN AN ELECTROLYTIC CELL CONTAINING AS ELECTROLYTIC AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID, SEPARATING THE RESULTING UF4.0.75H2O PERCIPITATE FROM THE RESULTANT SUPERNTANT LIQUID AND HEATING SAID PERCIPITANT UNTIL SUBSTANTIALLY COMPLETE DEHYDRATION TO UF4 IS EFFECTED.
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) | 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 |