MULTISTAGE FILTER CARTRIDGE
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United States of America
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Issued Date -
Apr 7, 2022
app pub date -
Oct 2, 2020
filing date -
Oct 2, 2020
priority date (Note) -
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Abstract
A multistage filter cartridge includes a generally circular outer filtering stage composed of a melt blown polypropylene material having an outer surface and an inner surface and an inner diameter and an outer diameter, and a generally circular inner filtering stage composed of carbon and a binder material forming a carbon block having an outer surface and an inner surface and an inner diameter and an outer diameter. A first void is disposed between the inner surface of the outer layer and the outer surface of the inner layer, and a second void within the inner surface of the carbon block, said voids being filled with granular, filtering material.
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