US4562158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid phase scintillation counting method
Assignee: EASTERN VIRGINIA MEDICAL AUTHORITY 700 OLNEY ROAD PO BOS 1980 NORFOLK VA 23501 A BODY POLITIC AND CORPORATE OF STATE OF VA
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Filing: 1981-07-27
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Granted: 1985-12-31
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Expires: 2001-07-27
Abstract
Abstract A solid phase scintillation counting method is provided wherein a scintillating material is added to an inert carrier and a radioactive substance is caused to contact the carrier either before or after the scintillating material has been applied. The treated carrier is then counted in the solid state in a liquid scintillation counter without the necessity of dissolving the radioactive substance in a liquid solution containing a scintillator. The invention provides a highly efficient and very convenient method for counting low energy radioactive isotopes such as 14C and 3H.
Inventors
- 👤 Karl A. Schellenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:15
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/204; G01T1/2042
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
65 words
A solid state scintillation counting method comprising the steps of contacting a carrier with a detergent, contacting said carrier with a radioactive substance, applying a scintillating material to said carrier and counting scintillations of the material applied to said carrier in a liquid scintillation counter, said carrier being impregnated with the scintillating material, the radioactive substance and the detergent at the time of the counting.
Claim 2
Dependent Claim
65 words
A solid state scintillation counting method comprising the steps of contacting a carrier with a detergent, contacting said carrier with a radioactive substance, applying a scintillating material to said carrier and counting scintillations of the material applied to said carrier in a liquid scintillation counter, said carrier being impregnated with the scintillating material, the radioactive substance and the detergent at the time of the counting.
Claim 3
Dependent Claim
37 words
The method according to claim 1, further comprising the step of adding a solvent to said scintillating material prior to said applying step, wherein said scintillating material is contained in a solution when applied to said carrier.
Claim 4
Dependent Claim
23 words
The method according to claim 2, further comprising the step of drying said solvent after said applying step but before said counting step.
Claim 5
Dependent Claim
27 words
The method according to claim 1, further comprising the step of placing said carrier in a scintillation vessel after said applying step and before said counting step.
Claim 6
Dependent Claim
29 words
The method according to claim 1, wherein said carrier is a thin layer, further comprising the step of segmenting the carrier before placing said carrier in said scintillation vessel.
Claim 7
Dependent Claim
57 words
A solid state scintillation counting method comprising the steps of applying a scintillating material to a carrier, contacting the carrier with a radioactive substance, and counting scintillations of the material applied to said carrier in a liquid scintillation counter, said carrier being impregnated with the scintillating material and the radioactive substance at the time of the counting.
Claim 8
Dependent Claim
57 words
A solid state scintillation counting method comprising the steps of applying a scintillating material to a carrier, contacting the carrier with a radioactive substance, and counting scintillations of the material applied to said carrier in a liquid scintillation counter, said carrier being impregnated with the scintillating material and the radioactive substance at the time of the counting.
Claim 9
Dependent Claim
37 words
The method according to claim 6, further comprising the step of adding a solvent to said scintillating material prior to said applying step, wherein said scintillating material is contained in a solution when applied to said carrier.
Claim 10
Dependent Claim
22 words
The method according to claim 6, further comprising the step of adding a detergent to said carrier prior to said contacting step.
Claim 11
Dependent Claim
40 words
The method according to claim 6, further comprising the step of adding a solvent and a detergent to said scintillating material prior to said applying step, wherein said scintillating material is contained in a solution when applied to said carrier.
Claim 12
Dependent Claim
25 words
The method according to claim 7 or 9, further comprising the step of drying said solvent after said applying step but before said counting step.
Claim 13
Dependent Claim
27 words
The method according to claim 6, wherein said applying step comprises the steps of mixing said scintillating material with a carrier substance and then forming said carrier.
Claim 14
Dependent Claim
30 words
The method according to claim 6, wherein said applying step comprises the steps of mixing said scintillating material with a solvent and a carrier substance, and then forming said carrier.
Claim 15
Dependent Claim
32 words
The method according to claim 6, wherein said applying step comprises the steps of mixing said scintillating material with a solvent, a detergent, and a carrier substance, and then forming said carrier.
Claim 16
Dependent Claim
31 words
The method according to claim 6, wherein said carrier is in the form of a strip and said contacting step comprises wiping said strip on a surface containing a radioactive substance.
Claim 17
Independent Claim
64 words
A method for determining amounts of low-energy radioactive isotopes comprising the steps of contacting a strip comprising a carrier, a scintillating material, and a detergent with a surface containing a radioactive substance and then determining radioactivity of the strip in a liquid scintillation counter, said strip being impregnated with the scintillating material, the radioactive substance and the detergent at the time of the counting.
Claim 18
Independent Claim
64 words
A method for determining amounts of low-energy radioactive isotopes comprising the steps of contacting a strip comprising a carrier, a scintillating material, and a detergent with a surface containing a radioactive substance and then determining radioactivity of the strip in a liquid scintillation counter, said strip being impregnated with the scintillating material, the radioactive substance and the detergent at the time of the counting.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |