Patent · US Expired

Test device and a method for the detection of a component of a liquid sample

US4824639A · kind A · utility

173Cited by

4References

17Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karlheinz Hildenbrand · Krefeld, DE
Hans-Hagen von Dohren · Witten, DE
Hermann Perrey · Krefeld, DE
Georg Frank · Nürnberg, DE
Rolf Dhein · Krefeld, DE

Key dates

Filing date	Feb 3, 1988
Grant date	Apr 25, 1989
Priority date	—
Expiry date	Feb 3, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S435/805
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In a test strip for the detection of a component in a liquid sample, the strip comprising a support layer, a microporous polymer layer and a reagent for the detection of the component to be determined, the improvement wherein the microporous polymer layer is a membrane which has an asymmetric pore structure with the narrower pores being on the side to which the sample is applied, and the support layer is macroscopically smooth. The porous membrane is produced by coagulation from solution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.