Active-particulate air filter having monolith primary filter and polishing filter
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United States of America Patent
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Dec 31, 2013
Grant Date -
Mar 31, 2011
app pub date -
Sep 30, 2009
filing date -
Sep 30, 2009
priority date (Note) -
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Abstract
An air filter that includes a primary filter and a polishing filter. The primary filter comprises a monolith 10 that contains active-particulate. The air-to-be-filtered travels through the primary filter in a path generally parallel to the passageways 12. The polishing filter 36 has first and second major surfaces and also contains active-particulate. The polishing filter is generally arranged such that air travels from the first major surface to the second major surface when passing through it. The inventive filter demonstrates extraordinary performance over the same primary and polishing filters taken individually.
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