Liquid filtration media

Details Liquid filtration media Liquid filtration media

2008-02-29

2011-10-18

Fortuna, Ana (Department: 1777)

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

C210S488000, C210S489000, C210S499000, C210S508000, C210S509000

Reexamination Certificate

active

08038013

ABSTRACT:
A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.95 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.01 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.

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