Filter device
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United States of America Patent
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-
Sep 4, 1984
Grant Date -
N/A
app pub date -
Dec 9, 1982
filing date -
Dec 9, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A filter device is provided with a multi-layer filter which includes a central highly absorbent layer which expands in the presence of moisture and positioned between an outer layer of absorbent paper and an inner layer of fiber glass adjacent to an inner ply. The filter is longitudinally pleated.
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