Air filter

Details Air filter Air filter

2005-01-18

2005-01-18

Smith, Duane (Department: 1724)

Gas separation

Two or more separators

Plies or layers of different characteristics or orientation

C055S385300, C055S487000, C055S524000, C055S528000

Reexamination Certificate

active

06843819

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 layer11impregnated with oil and the second filter layer12, which is provided on the downstream side of the first filter layer11and serves as a lipophobic layer having an oil-repellent property. The filter material of the first filter layer11has a higher density than the filter material of the second filter material12.

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