Multilayered test device for determining the presence of a liquid sample component, and method of use
US4160008A · kind A · utility
65Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1978 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Jan 26, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/805
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test device for determining the presence of a liquid sample constituent. The device comprises a base support member having attached to it an indicator member which produces a detectable response, such as a color change, in the presence of the sample constituent. The indicator member comprises an upper reagent layer, a lower absorbent layer and a substantially sample-impervious barrier layer between the upper and lower layers. The indicator member is attached to the base member along the lower side of the absorbent layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.