Two stage air filter
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United States of America Patent
Stats
-
Sep 28, 2004
Grant Date -
Sep 4, 2003
app pub date -
Mar 1, 2002
filing date -
Mar 1, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A two stage air purification system is provided for the removal of airborne impurities from an airflow prior to the airflow entering a building's ductwork. In particular, a primary air filter is mounted within the hood of, for example, a cooking area and operable to receive grease-laden air and remove a portion of the impurities. The air is then sent to a secondary filter, also mounted within the hood, that removes additional impurities. The air is then sent through the building's ductwork and eventually out the building.
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Cited Art Landscape
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