Method for identifying select non-magnetic minerals in the presence of magnetic minerals
US4523149A · kind A · utility
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Key dates
| Filing date | Oct 15, 1982 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Oct 15, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sample of an earth formation is subjected to a magnetizing field. The magnetic and non-magnetic fractions of the earth formation sample are separated while under the influence of the magnetizing field. The weights of the magnetic and non-magnetic fractions are measured and the weight percentage of the magnetic fractions determined. The presence or absence of select minerals in the non-magnetic fraction is determined on the basis of the weight percentage of the magnetic fraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.