Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Reexamination Certificate
2006-08-29
2006-08-29
Warden, Jill (Department: 1743)
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
C422S130000
Reexamination Certificate
active
07097811
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 method 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: 3799742 (1974-03-01), Coleman
patent: 6637463 (2003-10-01), Lei et al.
Wu Jhy-Wen
Yao Nan-Kuang
Industrial Technology Research Institute
Levkovich Natalia
Warden Jill
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