Multilayer analytical element having an impermeable radiation diffusing and blocking layer
US4390343A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1982 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Apr 19, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S436/81
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multilayer analytical element for detecting a ligand in or the ligand binding capacity of a liquid sample of the type having a reagent layer incorporating reagents which are responsive to the ligand in or the ligand binding capacity of the sample to give a detectable response, a radiation diffusing and blocking layer, and a support layer, the improvement wherein the radiation diffusing and blocking layer is (a) interposed between the reagent layer and the support layer; (b) impermeable to the ligand, reagents of the reagent layer, and products of their interreaction; and (c) inert to the ligand, reagents of the reagent layer, and products of their interreaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.