The ornamental design for a filterelement, as shown and described.
FIG. 1 is a perspective view of another embodiment of a filter element, according to the new design, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 2 is a left elevational view of the filter element of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 3 is a right elevational view of the filter element of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 4 is a rear elevational view of the filter element of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 5 is a front elevational view of the filter element of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 6 is a top plan view of the filter element of FIG. 1 the portions shown in broken lines forming no part of the design sought to be patented; and,
FIG. 7 is a bottom plan view of the filter element of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented.