Patent US3269915A successfully refreshed from Google Patents.
US3269915A
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US
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Neutron irradiation process for producing radioisotopes wherein target isotope is shielded from thermal neutrons
Assignee: Neutron Products Inc
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Filing: 1963-07-05
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Granted: 1966-08-30
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Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 Jackson A Ransohoff
- 👤 Phillip M Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:02
CPC Classifications
G; G21; G21G; G21G1/00; G21G1/02; Y; Y10; Y10S; Y10S148/00; Y10S148/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A PROCESS FOR PRODUCING IN GOOD YIELD A PRODUCT RADIOISOTOPE, WHICH IS THE RESULT OF ONE NEUTRON ABSORPTION CAPTURE IN A TARGET RADIOISOTOPE HAVING A THERMAL NEUTRON CROSS SECTION LOWER THAN THAT OF THE PRODUCT ISOTOPE, WHICH COMPRISES: (A) INCORPORATING THE TARGET ISOTOPE IN AN IRRADIATION DEVICE WHEREIN THE SURFACE DENSITY OF SAID TARGET ISOTOPE IS AT LEAST 0.1 GRAM PER CM2; (B) SHIELDING OF SAID TARGET ISOTOPE FROM EXPOSURE TO THERMAL NEUTRONS BY INCORPORATING, PERIPHERAL TO SAID TARGET, ISOTOPE, NUCLIDE MATERIAL HAVING A HIGH THERMAL NEUTRON CROSS SECTION BY VIRTUE OF A NEUTRON INTERACTION RESONANCE PEAKING AT A NEUTRON ENERGY BELOW 0.3 E.V.; (C) IRRADIATING SAID TARGET ISOTOPE IN A NEUTRON ENVIRONMENT WHEREIN THE NEUTRON FLUX BETWEEN 0.3 E.V. AND 100 E.V. IS IN EXCESS OF 2.5X1013 NEUTRONS PER CM.2SEC.; AND (D) SEPARATING AND RECOVERING OF TARGET AND PRODUCT ISOTOPES BY CHEMICAL PROCESSING.
Claim 2
Dependent Claim
144 words
A PROCESS FOR PRODUCING IN GOOD YIELD A PRODUCT RADIOISOTOPE, WHICH IS THE RESULT OF ONE NEUTRON ABSORPTION CAPTURE IN A TARGET RADIOISOTOPE HAVING A THERMAL NEUTRON CROSS SECTION LOWER THAN THAT OF THE PRODUCT ISOTOPE, WHICH COMPRISES: (A) INCORPORATING THE TARGET ISOTOPE IN AN IRRADIATION DEVICE WHEREIN THE SURFACE DENSITY OF SAID TARGET ISOTOPE IS AT LEAST 0.1 GRAM PER CM2; (B) SHIELDING OF SAID TARGET ISOTOPE FROM EXPOSURE TO THERMAL NEUTRONS BY INCORPORATING, PERIPHERAL TO SAID TARGET, ISOTOPE, NUCLIDE MATERIAL HAVING A HIGH THERMAL NEUTRON CROSS SECTION BY VIRTUE OF A NEUTRON INTERACTION RESONANCE PEAKING AT A NEUTRON ENERGY BELOW 0.3 E.V.; (C) IRRADIATING SAID TARGET ISOTOPE IN A NEUTRON ENVIRONMENT WHEREIN THE NEUTRON FLUX BETWEEN 0.3 E.V. AND 100 E.V. IS IN EXCESS OF 2.5X1013 NEUTRONS PER CM.2SEC.; AND (D) SEPARATING AND RECOVERING OF TARGET AND PRODUCT ISOTOPES BY CHEMICAL PROCESSING.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |