Patent · US Active

Test element, system, and method of controlling the wetting of same

US7842235B2 · kind B2 · utility

1Cited by

12References

46Claims

0Family size

Assignee

Roche Diagnostics Operations, Inc. · US

Inventors

Gregor Ocvirk · Nierstein, DE
Peter Kraemer · Hanau, DE
Wolfgang Fiedler · Hemsbach, DE

Key dates

Filing date	Feb 14, 2005
Grant date	Nov 30, 2010
Priority date	—
Expiry date	Jan 4, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01L2400/0415
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a test element for the testing of a liquid sample. The test element includes a sample application area, a test field, a sample transport path extending between the sample application area and the test field and an actuator field including an electrically-conductive layer. The actuator field is switchable between a first state attracting the sample and a second state attracting the sample less by applying to the conductive layer an electric voltage that is different from an earth potential. The actuator field has a section that is arranged at about the same distance from the sample application area as the test field, measured along the sample transport path. Such that, a wetting of the test field by the sample can be controlled by applying a voltage to the actuator field.

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