Air filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 18, 2005
Grant Date -
Mar 13, 2003
app pub date -
Jan 23, 2002
filing date -
May 23, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
There is provided an air filter, which has a long lifetime and permits to capture effectively carbon particles and reduce costs. The air filter has the first filter layer 11 impregnated with oil and the second filter layer 12, which is provided on the downstream side of the first filter layer 11 and serves as a lipophobic layer having an oil-repellent property. The filter material of the first filter layer 11 has a higher density than the filter material of the second filter material 12.
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