Patent · US Expired

System for detecting fluids in a microfluidic component

US6774616B2 · kind B2 · utility

9Cited by

1References

18Claims

0Family size

Assignee

Eppendorf AG · DE

Inventors

Rudiger Huhn · Kellinghusen, DE
Dietmar Sander · Seevetal, DE
Andreas Graff · Hamburg, DE
Lutz Timmann · Barth, DE

Key dates

Filing date	Mar 1, 2002
Grant date	Aug 10, 2004
Priority date	—
Expiry date	Mar 1, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01L2300/0654
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system for detecting fluids in a microfluidic component having at least one microchannel including a limitation wall which has two surfaces which, facing the microchannel in a transparent area, are inclined towards each other at an acute angle, with the system further including a photo transmitter and a photo receiver which are disposed outside the component and are directed to the inclined surfaces in the transparent area of the limitation wall in such a way that if a gas is waiting in the microchannel on the two surfaces, a light ray emitted by the photo transmitter impinges on the photo receiver following a total reflection on the two surfaces and, if a liquid is waiting in the microchannel, the light ray enters the microchannel on at least one of the two surfaces and, as a result, the incidence of light into the photo receiver is reduced or prohibited.

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