Microporous filter media, filteration systems containing...

Details Microporous filter media, filteration systems containing... Microporous filter media, filteration systems containing...

2005-07-05

2005-07-05

Fortuna, Ana (Department: 1723)

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

C210S489000, C210S505000, C210S508000, C210S509000, C210S502100

Reexamination Certificate

active

06913154

ABSTRACT:
The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

REFERENCES:
patent: 6387415 (2002-05-01), Garris
patent: 6426382 (2002-07-01), Farrar et al.
patent: 6471876 (2002-10-01), Hansen et al.
patent: 6630016 (2003-10-01), Koslow
patent: 6660172 (2003-12-01), Koslow
patent: 6835311 (2004-12-01), Koslow
patent: WO 01/07090 (2001-02-01), None
patent: WO 01/93991 (2001-12-01), None

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