US3263080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation dosimeter for measuring exposure to high and low energy radiation
Assignee: Atomic Energy of Canada Ltd AECL
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Filing: 1963-08-09
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Granted: 1966-07-26
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Expires: 1983-08-09
Abstract
No abstract record available.
Inventors
- 👤 Cowper George
- 👤 Simpson Stuart Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:30
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A RADATION DOSIMETER FOR MEASURING EXPOSURE TO BOTH HIGH AND LOW ENERGY RADIATION WHICH COMPRISES, A RADIATION SENSITIVE FILM, A FILTER PLATE OVER SAID FILM FOR ABSORBING RADIATION FALLING THEREON, SAID FILTER SUBSTANTIALLY MASKING SAID FILM AT LOWER RADIATION ENERGIES WHILE PERMITTING EXPOSURE AT HIGHER RADIATION ENERGIES, SAID FILTER PLATE DEFINING A PREDETERMINED REGULARLY REPEATED PATTERN OF HOLES THERETHROUGH FOR INCREASING EXPOSURE OF SAID FILM BY SAID LOWER ENERGY RADIATION IN AREAS BENEATH SAID HOLES. THE FREQUENCY OF REPETITION OF SAID HOLE PATTERN OVER EACH PORTION OF SAID PLATE BEING CHOSEN WITH RESPECT TO A VIEWING DENSITOMETER APERTURE FOR VIEWING THE FILM AFTER EXPOSURE, WHEREBY SAID APERTURE ENCOMPASSES A SUBSTANTIALLY UNIFORM RATIO OF AREA OF FLIM EXPOSED THROUGH SAID HOLES TO AREA OF SAID FILM EXPOSED THROUGH SAID PLATE REGARDLESS OF THE PORTION OF SAID FILM VIEWED BY SAID DENSITOMETER.
Claim 2
Dependent Claim
140 words
A RADATION DOSIMETER FOR MEASURING EXPOSURE TO BOTH HIGH AND LOW ENERGY RADIATION WHICH COMPRISES, A RADIATION SENSITIVE FILM, A FILTER PLATE OVER SAID FILM FOR ABSORBING RADIATION FALLING THEREON, SAID FILTER SUBSTANTIALLY MASKING SAID FILM AT LOWER RADIATION ENERGIES WHILE PERMITTING EXPOSURE AT HIGHER RADIATION ENERGIES, SAID FILTER PLATE DEFINING A PREDETERMINED REGULARLY REPEATED PATTERN OF HOLES THERETHROUGH FOR INCREASING EXPOSURE OF SAID FILM BY SAID LOWER ENERGY RADIATION IN AREAS BENEATH SAID HOLES. THE FREQUENCY OF REPETITION OF SAID HOLE PATTERN OVER EACH PORTION OF SAID PLATE BEING CHOSEN WITH RESPECT TO A VIEWING DENSITOMETER APERTURE FOR VIEWING THE FILM AFTER EXPOSURE, WHEREBY SAID APERTURE ENCOMPASSES A SUBSTANTIALLY UNIFORM RATIO OF AREA OF FLIM EXPOSED THROUGH SAID HOLES TO AREA OF SAID FILM EXPOSED THROUGH SAID PLATE REGARDLESS OF THE PORTION OF SAID FILM VIEWED BY SAID DENSITOMETER.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |