Candle filter element
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United States of America Patent
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Mar 1, 2005
Grant Date -
N/A
app pub date -
Feb 16, 2001
filing date -
Sep 21, 1998
priority date (Note) -
In Force
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Abstract
The multiple-tube filter proposed consists of at least one perforated filter element (15) whose outside surface has grooves (2) in a spiral round it, the surface between the grooves (2) preferably curving outwards in a circular arc.
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Cited Art Landscape
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