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US3554867A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of obtaining americium

Assignee: United States Atomic Energy Commission
•
Filing: 1946-08-23
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Granted: 1971-01-12
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Expires: 1966-08-23
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Abstract

Abstract 1. IN A PROCESS FOR THE SYNTHESIS OF ELEMENT 95, THE STEPS WHICH COMPRISE DISSOLVING A NEUTRON-IRRADIATED MASS OF URANIUM CONTAINING A TRANSURANIC FRACTION COMPRISING PREDOMINANTLY PLUTONIUM WHICH CONTAINS AT LEAST ABOUT 0.01% OF THE ISOTOPE 94**241 AND A DETECTABLE QUANTITY OF ELEMENT 95 IN AN AQUEOUS ACIDIC SOLUTION, OXIDIZING THE PLUTONIUM CONTAINED IN THE RESULTING SOLUTION TO A VALENT STATE GREATER THAN +4, REMOVING URANIUM FISSION PRODUCTS AND ELEMENT 95 THEREFROM BY MEANS OF A WATER-INSOLUBLE RARE EARTH SALT CARRIER, DISSOLVING THE CARRIER PRECIPITATE THUS OBTAINED, INTRODUCING FLOUSILICATE IONS INTO THE RESULTING SOLUTION, CONTACTING SAID SOLUTION WITH A WATER-INSOLUBLE RARE EARTH SALT CARRIER FOR SAID FISSION PRODUCTS AND SEPARATING THE RESULTING PRECIPITATE, ADDING SUFFICIENT HYDROFLUORIC ACID TO RENDER THE SUPERNATANT SOLUTION THUS OBTAINED FROM ABOUT 3 TO 6 M WITH RESPECT THERETO, THEREAFTER CONTACTING THE SOLUTION WITH A WATER-INSOLUBLE RARE EARTH SALT CARRIER FOR ELEMENT 95, AND SEPARATING THE CARRIER PRECIPITATE FROM THE SOLUTION.

Inventors

  • 👤 Stanley G Thompson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 05:58
CPC Classifications
C; C01; C01G; C01G56/00; C01G56/001; C01G56/002

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 154 words
IN A PROCESS FOR THE SYNTHESIS OF ELEMENT 95, THE STEPS WHICH COMPRISE DISSOLVING A NEUTRON-IRRADIATED MASS OF URANIUM CONTAINING A TRANSURANIC FRACTION COMPRISING PREDOMINANTLY PLUTONIUM WHICH CONTAINS AT LEAST ABOUT 0.01% OF THE ISOTOPE 94**241 AND A DETECTABLE QUANTITY OF ELEMENT 95 IN AN AQUEOUS ACIDIC SOLUTION, OXIDIZING THE PLUTONIUM CONTAINED IN THE RESULTING SOLUTION TO A VALENT STATE GREATER THAN +4, REMOVING URANIUM FISSION PRODUCTS AND ELEMENT 95 THEREFROM BY MEANS OF A WATER-INSOLUBLE RARE EARTH SALT CARRIER, DISSOLVING THE CARRIER PRECIPITATE THUS OBTAINED, INTRODUCING FLOUSILICATE IONS INTO THE RESULTING SOLUTION, CONTACTING SAID SOLUTION WITH A WATER-INSOLUBLE RARE EARTH SALT CARRIER FOR SAID FISSION PRODUCTS AND SEPARATING THE RESULTING PRECIPITATE, ADDING SUFFICIENT HYDROFLUORIC ACID TO RENDER THE SUPERNATANT SOLUTION THUS OBTAINED FROM ABOUT 3 TO 6 M WITH RESPECT THERETO, THEREAFTER CONTACTING THE SOLUTION WITH A WATER-INSOLUBLE RARE EARTH SALT CARRIER FOR ELEMENT 95, AND SEPARATING THE CARRIER PRECIPITATE FROM THE SOLUTION.
Claim 2
Dependent Claim 154 words
IN A PROCESS FOR THE SYNTHESIS OF ELEMENT 95, THE STEPS WHICH COMPRISE DISSOLVING A NEUTRON-IRRADIATED MASS OF URANIUM CONTAINING A TRANSURANIC FRACTION COMPRISING PREDOMINANTLY PLUTONIUM WHICH CONTAINS AT LEAST ABOUT 0.01% OF THE ISOTOPE 94**241 AND A DETECTABLE QUANTITY OF ELEMENT 95 IN AN AQUEOUS ACIDIC SOLUTION, OXIDIZING THE PLUTONIUM CONTAINED IN THE RESULTING SOLUTION TO A VALENT STATE GREATER THAN +4, REMOVING URANIUM FISSION PRODUCTS AND ELEMENT 95 THEREFROM BY MEANS OF A WATER-INSOLUBLE RARE EARTH SALT CARRIER, DISSOLVING THE CARRIER PRECIPITATE THUS OBTAINED, INTRODUCING FLOUSILICATE IONS INTO THE RESULTING SOLUTION, CONTACTING SAID SOLUTION WITH A WATER-INSOLUBLE RARE EARTH SALT CARRIER FOR SAID FISSION PRODUCTS AND SEPARATING THE RESULTING PRECIPITATE, ADDING SUFFICIENT HYDROFLUORIC ACID TO RENDER THE SUPERNATANT SOLUTION THUS OBTAINED FROM ABOUT 3 TO 6 M WITH RESPECT THERETO, THEREAFTER CONTACTING THE SOLUTION WITH A WATER-INSOLUBLE RARE EARTH SALT CARRIER FOR ELEMENT 95, AND SEPARATING THE CARRIER PRECIPITATE FROM THE SOLUTION.

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) 1974-01-11 1974-07-13 1975-01-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-01-11 1978-07-13 1979-01-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-01-11 1982-07-13 1983-01-12 $7700.00 Window Closed / Lapsed

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