Filter element with membrane-type filter material
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United States of America Patent
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Jan 8, 1991
Grant Date -
N/A
app pub date -
Jun 2, 1989
filing date -
Jun 3, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A filter element for a filter cartridge has an upstream or prefiltering membrane with frustoconical pores converging in the direction of liquid flow through the filter element and a final filtering membrane at the downstream side with cylindrical pores smaller than the smallest diameter of the frustoconical pores.
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