US2887358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large scale method for the production and purification of curium
Assignee: Individual
•
Filing: 1957-12-12
•
Granted: 1959-05-19
•
Expires: 1977-12-12
Abstract
No abstract record available.
Inventors
- 👤 Gary H Higgins
- 👤 William W T Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:41
CPC Classifications
C; C01; C01G; C01G56/00; C01G56/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A PROCESS FOR RECOVERING AND PURIFYING CURIUM VALUES FROM AN ACIDIC AQUEOUS CONCENTRATED LICL SOLUTION MIXTURE OF AT LEAST LANTHANIDES AND ACTINIDES, THE STEPS COMPRISING CONTACTING SAID SOLUTIN WITH A STRONG BASE ANIOMIC EXCHANGE RESIN TO ADSORB CURIUM VALUES WITH LANTHANIDES AND ACTINIDES THEREON, CONTACTING THE RESIN ADSORBATE WITH AN AQUEOUS ELUTRIANT SOLUTION CONTAINING ABOUT 1095 M LICL AND 0.1 N HCL TO ELUTE LANTHANIDES THEREFROM, AND THEN CONTACTING THE RESIN ADSORBATE WITH AN AQUEOUS ELUTRIANT SOLUTION CONTAINING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ABOUT 10 TO 12 N HC1, AND ABOUT 10 TO 12 N HCL WITH ABOUT 0.1 N HNO3 TO ELUTE CURIUM VALUES FROM THE RESIN.
Claim 2
Dependent Claim
112 words
IN A PROCESS FOR RECOVERING AND PURIFYING CURIUM VALUES FROM AN ACIDIC AQUEOUS CONCENTRATED LICL SOLUTION MIXTURE OF AT LEAST LANTHANIDES AND ACTINIDES, THE STEPS COMPRISING CONTACTING SAID SOLUTIN WITH A STRONG BASE ANIOMIC EXCHANGE RESIN TO ADSORB CURIUM VALUES WITH LANTHANIDES AND ACTINIDES THEREON, CONTACTING THE RESIN ADSORBATE WITH AN AQUEOUS ELUTRIANT SOLUTION CONTAINING ABOUT 1095 M LICL AND 0.1 N HCL TO ELUTE LANTHANIDES THEREFROM, AND THEN CONTACTING THE RESIN ADSORBATE WITH AN AQUEOUS ELUTRIANT SOLUTION CONTAINING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ABOUT 10 TO 12 N HC1, AND ABOUT 10 TO 12 N HCL WITH ABOUT 0.1 N HNO3 TO ELUTE CURIUM VALUES FROM THE RESIN.
References Cited (Backward Citations)
US2711362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |