Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Reexamination Certificate
2007-09-25
2007-09-25
Warden, Jill (Department: 1743)
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
C422S130000, C422S051000
Reexamination Certificate
active
10836011
ABSTRACT:
A gravity-driven apparatus and method control the flow order of reactants in microfluidic devices which are employed in a microfluidic chip. The gravity-driven apparatus flow order control mainly comprises a plurality of reactant chambers arranged at different heights, a plurality of flow-control microchannels, and a reaction chamber having a winding collection microchannel. Each reactant chamber has an air-in vent. Each pair of neighboring flow-control microchannels has a U-shaped structure connecting the pair of neighboring flow-control microchannels. To activate the microfluidic device, the device is placed in an inclining or standing position and the air-in vents are unsealed. This apparatus enhances the reliability of flow order control for multiple reactants. It can be built in a microfluidic chip, and does not use any actuating power or element. Therefore, it is low in energy-consumption, low in manufacturing cost and free of pollution.
REFERENCES:
patent: 2002/0142471 (2002-10-01), Handique et al.
patent: 2002/0150683 (2002-10-01), Troian et al.
patent: 2003/0150733 (2003-08-01), Ramsey
Wu Jhy-Wen
Yao Nan-Kuang
Industrial Technology Research Institute
Levkovich Natalia
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