Gas separation – With means securing or retaining separating media – Unit or cohesive sheet-like media in flow line or frame
Reexamination Certificate
2005-01-18
2005-01-18
Smith, Duane (Department: 1724)
Gas separation
With means securing or retaining separating media
Unit or cohesive sheet-like media in flow line or frame
C055S497000, C055S499000, C055S500000, C055S501000, C055S503000, C055S521000, C055SDIG003
Reexamination Certificate
active
06843820
ABSTRACT:
A filter assembly with a frame and a filter element including a sheet of filter media with attachment strips at opposite ends. The frame positions the filter element with the filter media across a passageway in the frame and with the attachment strips along opposite end parts of a perimeter portion of the frame. Abutments extend along the perimeter portion between its end parts and along opposite edges of the filter material. Projections on the end parts are engaged in openings in the attachment strips and are spaced from the abutments such that the filter element can be mounted on the frame with either of the attachment strips engaged with the projections at either of the end parts while the filter element can only be mounted on the frame with an inlet surface of the sheet of filter material facing the same direction as a front surface of the frame.
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U.S. Appl. No. 10/172,575, filed Jun. 14, 2002, Filter Assembly.
3M Innovative Properties Company
Greene Jason M.
Huebsch William L.
Smith Duane
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