Assay device having rhombus-shaped projections
US9651489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2012 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Jan 17, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2400/086
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An assay device includes: a liquid sample receiving zone; a capture zone in fluid communication with the sample receiving zone having capture elements bound thereto, the capture zone having a substrate and projections which extend substantially vertically from the substrate, the projections having a rhombus-shaped cross-section and the projections arranged on the substrate with the corners of the projections facing upstream in a direction toward the sample receiving zone. The projections have a height, cross-section and a distance between one another that defines a capillary space between the projections capable of generating capillary flow parallel to the substrate surface; and a sink in fluid communication with the capture zone having a capacity to receive liquid sample flowing from the capture zone. The sample receiving zone, the capture zone and the sink define a fluid flow path. Preferably, the rhombus-shaped cross-section is a square or a diamond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.