Gas separation: processes – Deflecting – And filtering
Reexamination Certificate
2006-02-07
2006-02-07
Hopkins, Robert A. (Department: 1724)
Gas separation: processes
Deflecting
And filtering
C095S269000, C095S274000, C095S900000, C055S337000, C055S346000, C055S466000, C055S483000, C055S484000, C055S467000, C055S516000, C055S523000, C055S486000, C055S512000, C055SDIG036, C096S135000
Reexamination Certificate
active
06994743
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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Breitenfeldt Alan Lorenz
Brownell Kyle A.
Mathews Scott W.
Neitzel Emery W.
Greenheck Fan Corporation
Hopkins Robert A.
Quarles & Brady LLP
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