Patent · US Expired

Water-absorbing, essentially water-free membrane for reagent substrates and methods of preparing the same

US4780411A · kind A · utility

48Cited by

12References

12Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl-Erwin Piejko · Bensberg, DE
Bruno Bomer · Bensberg, DE
Herbert Bartl · Odenthal, DE
Georg Frank · Nürnberg, DE

Key dates

Filing date	Sep 11, 1985
Grant date	Oct 25, 1988
Priority date	—
Expiry date	Sep 11, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/254
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

In a reagent strip for the dry-chemical detection of a component of an aqueous sample solution comprising a detection reagent in a membrane, the improvement wherein the membrane is an essentially anhydrous, but water-absorbing, membrane for a reagent substrate in an analytical agent for the dry-chemical detection of a component of an aqueous sample solution, comprising at least one hydrophobic film-forming, water insoluble organic polymer in which at least one hydrophilic organic polymer is dispersed as discrete particles. The reagent can be incorporated into the membrane when produced or can later be applied as by impregnation. The membrane performs as well as or better than multi-layer strips.

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