Multi-spot enzyme immunoassay method
US4803154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1986 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Apr 25, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S436/809
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An assay for an immunologically active substance (B) in a biologically derived test sample comprising using an immuno-active membrane of a hydrophobic polymer sheet having numerous hydrophilic spots, on which a prefixed amount of an immuno-active substance (A) or (B) has been immobilized, and a coloring-membrane having numerous spots which contain a color-producing reagent being capable of developing color by the catalytic effect of an enzyme at the corresponding positions to those of the immuno-active membrane, and making contact the immuno-active membrane with said test sample in the presence of an enzyme-labeled immuno-active substance (A') or (B') and a substrate for reacting the substance (A), substance (B) and enzyme-labeled substance (A') or (B') competitively or non-competitively, and superposing the coloring-membrane of on the immuno-active membrane, followed by colorimetrically measuring the resulting color and thereby determining the amount of the substance (B) in the test sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.