Filter for Air Purifier

FIG. 1 is a top perspective view of a filter for air purifier according to a first embodiment showing our new design; FIG. 2 is a bottom perspective view thereof; FIG. 3 is another bottom perspective view thereof; FIG. 4 is a front elevational view thereof; FIG. 5 is a rear elevational view thereof; FIG. 6 is a left side elevational view thereof; FIG. 7 is a right side elevational view thereof; FIG. 8 is a top plan view thereof; FIG. 9 is a bottom plan view thereof; FIG. 10 is an enlarged view taken from circle 10 in FIG. 3 ; FIG. 11 is a cross-sectional view thereof, taken along lines 11 - 11 of FIG. 9 ; FIG. 12 is a top perspective view of a filter for air purifier according to a second embodiment; FIG. 13 is a bottom perspective view of FIG. 12 ; FIG. 14 is another bottom perspective view FIG. 12 ; FIG. 15 is a front elevational view FIG. 12 ; FIG. 16 is a rear elevational view FIG. 12 ; FIG. 17 is a left side elevational view FIG. 12 ; FIG. 18 is a right side elevational view FIG. 12 ; FIG. 19 is a top plan view FIG. 12 ; FIG. 20 is a bottom plan view FIG. 12 ; FIG. 21 is an enlarged view taken from circle 21 in FIG. 14 ; FIG. 22 is a cross-sectional view thereof, taken along lines 22 - 22 of FIG. 20 ; FIG. 23 is a top perspective view of a filter for air purifier according to a third embodiment; FIG. 24 is a bottom perspective view of FIG. 23 ; FIG. 25 is another bottom perspective view FIG. 23 ; FIG. 26 is a front elevational view FIG. 23 ; FIG. 27 is a rear elevational view FIG. 23 ; FIG. 28 is a left side elevational view FIG. 23 ; FIG. 29 is a right side elevational view FIG. 23 ; FIG. 30 is a top plan view FIG. 23 ; FIG. 31 is a bottom plan view FIG. 23 ; FIG. 32 is an enlarged view taken from circle 32 in FIG. 25 ; FIG. 33 is a cross-sectional view thereof, taken along lines 33 - 33 of FIG. 31 ; FIG. 34 is a top perspective view of a filter for air purifier according to a fourth embodiment; FIG. 35 is a bottom perspective view of FIG. 34 ; FIG. 36 is another bottom perspective view FIG. 34 ; FIG. 37 is a front elevational view FIG. 34 ; FIG. 38 is a rear elevational view FIG. 34 ; FIG. 39 is a left side elevational view FIG. 34 ; FIG. 40 is a right side elevational view FIG. 34 ; FIG. 41 is a top plan view FIG. 34 ; FIG. 42 is a bottom plan view FIG. 34 ; FIG. 43 is an enlarged view taken from circle 43 in FIG. 36 ; and, FIG. 44 is a cross-sectional view thereof, taken along lines 44 - 44 of FIG. 42 . The dash-dash broken lines in the drawings depict portions of the filter for air purifier that form no part of the claimed design. The dot-dash broken lines in the drawings depict the boundaries of the enlarged views that form no part of the claimed design.