Exchangeable media filter
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United States of America Patent
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Feb 5, 2013
Grant Date -
Mar 17, 2011
app pub date -
Apr 19, 2010
filing date -
Sep 15, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A filter element for a pool or spa including a sintered plastic outer cylinder of a first diameter, a sintered plastic inner cylinder of a second diameter less than said first diameter; the inner cylinder being position coaxially with respect to the outer cylinder to define an annular interior chamber; and a selected granulated filter medium or combination of media residing in the annular interior chamber.
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