Patent US4407415A successfully refreshed from Google Patents.
US4407415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of grade determination including compensation
Assignee: General Mining Union Corp Ltd
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Filing: 1980-11-28
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Granted: 1983-10-04
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Expires: 2000-11-28
Abstract
Abstract A method of determining the grade of a radioactive ore particle wherein a grade measurement of the particle e.g. the ratio of its radioactivity to its mass is corrected by means of predetermined calibration factors which are dependent on one or more of the shape, size, density or mass of the particle.
Inventors
- 👤 Rolf C. Bohme
- 👤 Max M. Lazerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:00
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/346
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A method of determining the grade of a radioactive particle which includes the steps of obtaining a measure of the radioactivity of the particle, obtaining a measure of the volume of the particle, deriving a measure of the particle's mass from the volume measurement, deriving a grade measurement of the particle from the ratio of the radioactivity measure to the mass measure, and correcting the grade measurement by applying a corrective factor which is dependent on the mass of the particle.
Claim 2
Independent Claim
81 words
A method of determining the grade of a radioactive particle which includes the steps of obtaining a measure of the radioactivity of the particle, obtaining a measure of the volume of the particle, deriving a measure of the particle's mass from the volume measurement, deriving a grade measurement of the particle from the ratio of the radioactivity measure to the mass measure, and correcting the grade measurement by applying a corrective factor which is dependent on the mass of the particle.
Claim 3
Independent Claim
90 words
A method of determining the grade of a radioactive particle which includes the steps of obtaining a measure of the radioactivity of the particle, obtaining a measure of the volume of the particle, deriving a measure of the particle's mass from the volume measurement, deriving a grade measurement of the particle from the ratio of the radioactivity measure to the mass measure, categorizing the particle according to its shape, and correcting the grade measurement by applying a corrective factor which is dependent of the category of shape of the particle.
Claim 4
Independent Claim
90 words
A method of determining the grade of a radioactive particle which includes the steps of obtaining a measure of the radioactivity of the particle, obtaining a measure of the volume of the particle, deriving a measure of the particle's mass from the volume measurement, deriving a grade measurement of the particle from the ratio of the radioactivity measure to the mass measure, categorizing the particle according to its shape, and correcting the grade measurement by applying a corrective factor which is dependent of the category of shape of the particle.
Claim 5
Dependent Claim
26 words
A method according to claim 2 wherein the corrective factor takes into account density variations which are dependent on the category of shape of the particle.
Claim 6
Dependent Claim
27 words
A method according to claim 2 wherein the corrective factor takes into account radioactivity count variations which are dependent on the category of shape of the particle.
Claim 7
Dependent Claim
53 words
A method according to claim 2 wherein the radioactivity of the particle is determined by causing the particle to move past at least one radiation detector, the method including the step for each detector of measuring the radioactivity of the particle only when the particle is within a fixed distance of the detector.
References Cited (Backward Citations)
US2717693A
Cited
DE958102C
Cited
US3052353A
Cited
US3075641A
Cited
US3272332A
Cited
US3747755A
Cited
US4317521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |