Air filters
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United States of America Patent
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-
Feb 12, 1985
Issued Date -
N/A
app pub date -
Mar 12, 1980
filing date -
Mar 29, 1974
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A generally tubular pleated paper filter element is constructed in the form of a frustrum of a cone having an aspect ratio (the ratio of element length to base diameter) in the range 1.5 to 2.5 and an included angle in the range 2 to 5 degrees.
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Cited Art Landscape
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