Asymmetric porous membranes

US6287867A · kind A · utility

Assignee

• Roche Diagnostics GMBH · DE

Inventors

• Herbert Harttig · Neustadt, DE
• Hartmut Merdes · Heidelberg, DE
• Hans Lange · Worms, DE
• Manfred Zeiler · Altlußheim, DE

Key dates

• Filing date: Aug 26, 1994
• Grant date: Sep 11, 2001
• Expiry date: Aug 26, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2001/4016
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention concerns the use of an asymmetric porous membrane for the evenly distributed concentration of a substance which is not or not substantially adsorbed to the membrane and which is brought into contact with the membrane in the form of a membrane-wetting solution on the fine-pored side of the membrane.