Radial absorption device
US5668017A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1995 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Feb 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S436/809
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The assay device of this invention provides for very simple assay procedures leading to rapid, sensitive, specific detection of an analyte in a solution. The device is inexpensive and easily manufactured, particularly if automated manufacturing processes are used. The assay device is a test strip having an elongated support sheet of solid non-porous material attached to a similarly shaped sheet of absorbent material. The absorbent sheet has perforations, preferably of circular shape, forming sample receiving wells. Forming the bottom of the sample receiving wells is one surface of the support sheet, and attached to this surface are moieties which specifically bind the analyte (anti-analyte moieties). A liquid sample for assay is placed in the wells, and the liquid is drawn into the absorbent material. As the liquid is absorbed, it flows tangentially across the surface of the support sheet, and across binding moieties specific for the analyte which are attached to the bottom of the wells. If analyte is present in the sample, analyte will form a complex with anti-analyte attached to the support surface, and detection of the complex will demonstrate the presence of the analyte.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.