Patent US2020935A successfully refreshed from Google Patents.
Patent US3555277A successfully refreshed from Google Patents.
US3555277A
Expired / Lapsed
US
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High thermal conductivity gas thermoluminescent dosimeter
Assignee: United States Department of the Navy
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Filing: 1968-06-27
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Granted: 1971-01-12
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Expires: 1988-06-27
Abstract
Abstract This invention is directed to an improved thermoluminescent dosimeter of the type in which the dosimeter material and heater elements are combined into a unitary element. The improvement is brought about by increasing the thermal conductivity between the heating means and the thermoluminescent material.
Inventors
- 👤 Frank H Attix
- 👤 Edward J West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:00
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/10; G01T1/11
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
A thermoluminescent dosimeter which comprises: a thermoluminescent phosphor having energy storage persistence at normal temperature; a light-transparent container within which said phosphor is held; a high thermal conductivity gas; said gas surrounding said phosphor in direct contract therewith within said container and filling any void spaces within said phosphor; and heater means associated with said container for heating said phosphor and said gas to above the glow temperature of said phosphor.
Claim 2
Dependent Claim
71 words
A thermoluminescent dosimeter which comprises: a thermoluminescent phosphor having energy storage persistence at normal temperature; a light-transparent container within which said phosphor is held; a high thermal conductivity gas; said gas surrounding said phosphor in direct contract therewith within said container and filling any void spaces within said phosphor; and heater means associated with said container for heating said phosphor and said gas to above the glow temperature of said phosphor.
Claim 3
Dependent Claim
26 words
A thermoluminescent dosimeter as claimed in claim 1, in which said high thermal conductivity gas is selected from a group consisting of hydrogen, helium, and neon.
Claim 4
Dependent Claim
13 words
A thermoluminescent dosimeter as claimed in claim 2, wherein said gas is hydrogen.
Claim 5
Dependent Claim
14 words
A thermoluminescent dosimeter as claimed in claim 2, wherein as said gas is helium.
Claim 6
Dependent Claim
13 words
A thermoluminescent dosimeter as claimed in claim 2, wherein said gas is neon.
Claim 7
Dependent Claim
17 words
A thermoluminescent dosimeter as claimed in claim 2, wherein, said phosphor is in the form of granules.
Claim 8
Dependent Claim
21 words
A thermoluminescent dosimeter as claimed in claim 6, wherein, said heater means is an ohmic element surrounded by said phosphor granules.
Claim 9
Dependent Claim
23 words
A thermoluminescent dosimeter as claimed in claim 2, wherein: said phosphor is of a solid piece; and said heater extends through said phosphor.
Claim 10
Dependent Claim
27 words
A thermoluminescent dosimeter as claimed in claim 2, wherein: said phosphor is of a solid piece; and said heater is secured to one side of said phosphor.
Claim 11
Independent Claim
44 words
The method of operating a thermoluminescent dosimeter consisting of a powdered phosphor or a solid piece of phosphor, from which the thermoluminescent signal is released comprising the step of heating said phosphor on a planchet over which hydrogen, helium, or neon is slowly directed.
Claim 12
Independent Claim
44 words
The method of operating a thermoluminescent dosimeter consisting of a powdered phosphor or a solid piece of phosphor, from which the thermoluminescent signal is released comprising the step of heating said phosphor on a planchet over which hydrogen, helium, or neon is slowly directed.
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) | 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 |