Liquid purification or separation – Casing divided by membrane into sections having inlet – Cylindrical membrane
Reexamination Certificate
2006-10-30
2010-06-01
Menon, Krishnan S (Department: 1797)
Liquid purification or separation
Casing divided by membrane into sections having inlet
Cylindrical membrane
C210S321720, C210S321740, C210S321880, C210S650000, C210S652000, C210S456000
Reexamination Certificate
active
07727394
ABSTRACT:
A filter system and method of filtering a feed liquid utilizing a combined plurality of filter assemblies. Each filter assembly includes a filter housing, a filter cartridge and a spiral passageway for imparting secondary flow currents, particularly Dean-Flow currents, to fluid flowing within the spiral passageways to prevent particulate build-up on filter surfaces so as to extend filter life and duration between replacement. The filter system can be operated within positive or negative pressure filtration processes. A dual-stage filtration process utilizing a cap filter and a cylindrical depth filter is also disclosed.
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PCT/US06/60375 International Search Report, Sep. 10, 2008.
Jen Chang-Wie
Kopp Clinton V.
Yu Guanghua
Dual Vortex Microfiltration, LLC
Menon Krishnan S
Williamson III Thomas R.
Williamson Intellectual Property Law LLC
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