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US5155364A
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Solid-liquid reversible scintillator and method of using the same
Assignee: PerkinElmer Health Sciences BV
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Filing: 1989-02-23
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Granted: 1992-10-13
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Expires: 2009-02-23
Abstract
Abstract The present invention is a scintillator which emits light in response to radiation. The scintillator is capable of being reversibly changed between solid and liquid phases, whichever is desired, by temperature control. The scintillator comprises a fluorescent substance for converting radiation energy into light energy; a solvent which transfers radiation energy to the fluorescent substance and dissolves and diffuses the fluorescent substance and a radioactive substance acting as an object of measurement to thereby homogenize them; and a fixing substance which enables the solvent, the fluorescent substance and the radioactive substance to be fixed in a solid state and also liquified upon heating, the fixing substance being capable of phase change reversibility.
Inventors
- 👤 Haruo Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:23
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/04; G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/203; G01T1/204
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A solid-liquid reversible scintillating composition comprising: a fluorescent substance for converting radiation energy into light energy; a solvent which dissolves said fluorescent substance, transfers radiation energy to said fluorescent substance and wets, dissolves, and diffuses a radioactive substance acting as an object of measurement to thereby coat it uniformly; and a fixing substance which enables said solvent and said fluorescent substance to be fixed in a solid state and liquified upon heating, said fixing substance being capable of phase change reversibility.
Claim 2
Dependent Claim
81 words
A solid-liquid reversible scintillating composition comprising: a fluorescent substance for converting radiation energy into light energy; a solvent which dissolves said fluorescent substance, transfers radiation energy to said fluorescent substance and wets, dissolves, and diffuses a radioactive substance acting as an object of measurement to thereby coat it uniformly; and a fixing substance which enables said solvent and said fluorescent substance to be fixed in a solid state and liquified upon heating, said fixing substance being capable of phase change reversibility.
Claim 3
Dependent Claim
29 words
The solid-liquid reversible scintillating composition according to claim 1, wherein said fixing substance solidifies at an ambient temperature and liquifies at a temperature slightly higher than the ambient temperature.
Claim 4
Dependent Claim
16 words
The solid-liquid reversible scintillating composition according to claim 1, wherein said fixing substance is a paraffin.
Claim 5
Dependent Claim
17 words
The solid-liquid reversible scintillating composition according to claim 1, wherein said fixing substance is a surface-active agent.
Claim 6
Independent Claim
152 words
A method of using a solid-liquid reversible scintillating composition, comprising the steps of: (a) formulating a solid-liquid reversible scintillating composition comprising a fluorescent substance for converting radiation energy into light energy, a solvent which dissolves and transfers radiation energy to said fluorescent substance, and a fixing substance which enables said solvent and said fluorescent substance to be fixed in a solid state and liquified upon heating, said fixing substance being capable of phase change reversibility; (b) heating said solid-liquid reversible scintillating composition to a temperature not lower than the melting temperature thereof; (c) attaching said molten solid-liquid reversible scintillating composition to an object of measurement having a radioactive substance; (d) cooling said solid-liquid reversible scintillating composition attached to said object so that said scintillating composition is changed into a solid phase; and (e) measuring said radioactive substance in said solid-liquid reversible scintillating composition including said object which is in a solid phase.
Claim 7
Independent Claim
152 words
A method of using a solid-liquid reversible scintillating composition, comprising the steps of: (a) formulating a solid-liquid reversible scintillating composition comprising a fluorescent substance for converting radiation energy into light energy, a solvent which dissolves and transfers radiation energy to said fluorescent substance, and a fixing substance which enables said solvent and said fluorescent substance to be fixed in a solid state and liquified upon heating, said fixing substance being capable of phase change reversibility; (b) heating said solid-liquid reversible scintillating composition to a temperature not lower than the melting temperature thereof; (c) attaching said molten solid-liquid reversible scintillating composition to an object of measurement having a radioactive substance; (d) cooling said solid-liquid reversible scintillating composition attached to said object so that said scintillating composition is changed into a solid phase; and (e) measuring said radioactive substance in said solid-liquid reversible scintillating composition including said object which is in a solid phase.
References Cited (Backward Citations)
US4562158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |