Patent US4358083A successfully refreshed from Google Patents.
Patent US3372275A successfully refreshed from Google Patents.
US3372275A
Expired / Lapsed
US
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Neutron film dosimeter using multiple filter
Assignee: United States Atomic Energy Commission
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Filing: 1966-05-27
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Granted: 1968-03-05
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Leo F Kocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:56
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A FILM DOSIMETER ADAPTED TO BE WORN ON THE BODY, COMPRISING AT LEAST ONE SHEET OF PHOTOGRAPHIC FILM, THREE FILTERS MOUNTED ADJACENT TO ONE FACE OF SAID FILM, SAID FILTERS HAVING THE FOLLOWING CHARACTERISTICS; FILTER A, COMPRISING MATERIAL WHICH HAS A LOW CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS AND FAST NEUTRONS; FILTER B, COMPRISING AN INNER LAYER ADJACENT THE FILM HAVING A HIGH CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS AND AN OUTER LAYER OF A DIFFERENT MATERIAL ALSO HAVING A HIGH CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS, BOTH LAYERS HAVING LOW CAPTURE CROSS-SECTIONS FOR FAST NEUTRONS; FILTER C, COMPRISING AN INNER LAYER OF MATERIAL ADJACENT THE FILM WHICH HAS A HIGH CAPTURE CROSS-SECTION FOR THERMAL NEUTRON AND AN OUTER LAYER WHICH HAS LOW CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS, BOTH LAYERS HAVING LOW CAPTURE CROSS-SECTIONS FOR FAST NEUTRONS; FILTERS A, B AND C BEING SO DESIGNED AS TO GIVE SUBSTANTIALLY EQUAL ABSORPTION OF PHOTON RADIATION; AND MEANS FOR SUPPORTING SAID FILM AND FILTERS WITH THE FILM ADJACENT THE BODY.
Claim 2
Dependent Claim
165 words
A FILM DOSIMETER ADAPTED TO BE WORN ON THE BODY, COMPRISING AT LEAST ONE SHEET OF PHOTOGRAPHIC FILM, THREE FILTERS MOUNTED ADJACENT TO ONE FACE OF SAID FILM, SAID FILTERS HAVING THE FOLLOWING CHARACTERISTICS; FILTER A, COMPRISING MATERIAL WHICH HAS A LOW CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS AND FAST NEUTRONS; FILTER B, COMPRISING AN INNER LAYER ADJACENT THE FILM HAVING A HIGH CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS AND AN OUTER LAYER OF A DIFFERENT MATERIAL ALSO HAVING A HIGH CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS, BOTH LAYERS HAVING LOW CAPTURE CROSS-SECTIONS FOR FAST NEUTRONS; FILTER C, COMPRISING AN INNER LAYER OF MATERIAL ADJACENT THE FILM WHICH HAS A HIGH CAPTURE CROSS-SECTION FOR THERMAL NEUTRON AND AN OUTER LAYER WHICH HAS LOW CAPTURE CROSS-SECTION FOR THERMAL NEUTRONS, BOTH LAYERS HAVING LOW CAPTURE CROSS-SECTIONS FOR FAST NEUTRONS; FILTERS A, B AND C BEING SO DESIGNED AS TO GIVE SUBSTANTIALLY EQUAL ABSORPTION OF PHOTON RADIATION; AND MEANS FOR SUPPORTING SAID FILM AND FILTERS WITH THE FILM ADJACENT THE BODY.
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |