Method and apparatus for making measurements of patterns of magnetic particles in lateral flow membranes and microfluidic systems
US6597176B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/96
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is provided for quantitatively determining amounts and identities of substances whithin patterns of magnetic particles, such as within lateral flow membranes, microfludic systems, and the like. Magnetic particles are complexed with substances to be determined and are excited in an oscillating magnetic field. The magnetizations of the magnetic particles are thereby caused to oscillate at the excitation frequency to create their own fields. These fields are inductively coupled to at least one sensor such as sensing coils fabricated in a gradiometer configuration. The output signals from the sensing coils are appropriately amplified and processed to provide useful output indications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.