US3883738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of analysis of radioactive material separated into solid and liquid phases
Assignee: AMERLITE DIAGNOSTICS Ltd A BRITISH Co
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Filing: 1972-12-08
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Granted: 1975-05-13
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Expires: 1992-12-08
Abstract
Abstract In analyses, particularly competitive assays, in which a radioactive element is partitioned between the two phases, the level of activity of one phase is measured while the two phases are in contact in the same vessel. This is achieved by using a specially shaped vessel and/or by accurately collimating the counter and screening it from part of the contents of the vessel.
Inventors
- 👤 John Stuart Glover
- 👤 Bryan Peter Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:49
CPC Classifications
G; G01; G01T; G01T7/00; G01T7/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A METHOD OF PERFORMING AN ANALYSIS IN WHICH A RADIOACTIVE ELEMENT OR COMPOUND IS PARTIONED BETWEEN A LIQUID PHASE AND A DENSER SOLID PHASE, WHICH METHOD COMPRISES MEASURING THE LECVEL OF RADIOACTIVITY OF ONLY ONE OF THE TWO PHASES WHILE THAT PHASE IS IN CONTACT WITH THE OTHER PHASE, WHEREIN THE MEASURING DEVICE IS COLLIMATED AND SCREENED SO AS TO MEASURE THE RADIOACTIVITY OF SUBSTANTIALLY THE WHOLE OF THE LIQUID PHASE BUT NOT OF THE SOLID PHASE.
Claim 2
Independent Claim
77 words
A METHOD OF PERFORMING AN ANALYSIS IN WHICH A RADIOACTIVE ELEMENT OR COMPOUND IS PARTIONED BETWEEN A LIQUID PHASE AND A DENSER SOLID PHASE, WHICH METHOD COMPRISES MEASURING THE LECVEL OF RADIOACTIVITY OF ONLY ONE OF THE TWO PHASES WHILE THAT PHASE IS IN CONTACT WITH THE OTHER PHASE, WHEREIN THE MEASURING DEVICE IS COLLIMATED AND SCREENED SO AS TO MEASURE THE RADIOACTIVITY OF SUBSTANTIALLY THE WHOLE OF THE LIQUID PHASE BUT NOT OF THE SOLID PHASE.
Claim 3
Independent Claim
72 words
A method of performing an analysis in which a radioactive element or compound is partitioned between a liquid phase and a denser solid phase, which method comprises measuring the level of radioactivity of only one of the two phases while that phase is in contact with the other phase, wherein the measuring device is collimated and screened so as to measure the radioactivity of a selected part only of the liquid phase.
Claim 4
Independent Claim
72 words
A method of performing an analysis in which a radioactive element or compound is partitioned between a liquid phase and a denser solid phase, which method comprises measuring the level of radioactivity of only one of the two phases while that phase is in contact with the other phase, wherein the measuring device is collimated and screened so as to measure the radioactivity of a selected part only of the liquid phase.
Claim 5
Independent Claim
73 words
A method of performing an analysis in which a radioactive element or compound is partitioned between a liquid phase and a denser solid phase, which method comprises measuring the level of radioactivity of only one of the two phases while that phase is in contact with the other phase, wherein the measuring device is collimated and screened so as to measure the radioactivity of the solid phase but not of the liquid phase.
Claim 6
Independent Claim
73 words
A method of performing an analysis in which a radioactive element or compound is partitioned between a liquid phase and a denser solid phase, which method comprises measuring the level of radioactivity of only one of the two phases while that phase is in contact with the other phase, wherein the measuring device is collimated and screened so as to measure the radioactivity of the solid phase but not of the liquid phase.
References Cited (Backward Citations)
US3050628A
Cited
US2927209A
Cited
US3376114A
Cited
US3451777A
Cited
US3588504A
Cited
US3666854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |