US Patent 7993523 Liquid filtration media
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Patent 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 0.1 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.0002 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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Patent Inventor Names
Guanghui Chen0
Henricus Jacobus Cornelis Gommeren0
Lawrence Mark Knorr0
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US Patent 07993523 Liquid filtration media US Patent 7993523 Liquid filtration media
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Patent Number
07993523
Patent Number
7993523
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US Patent 07993523 Liquid filtration media
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Is a
Patent jurisdiction
Patent number
07993523
Date of patent
August 9, 2011
Patent application number
12284027
Date Filed
September 18, 2008
Patent primary examiner
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