The ornamental design for a closed coffeefilterbag, as shown and described.
FIG. 1 is a perspective view of a closed coffee filter bag;
FIG. 2 is a side view of the closed coffee filter bag;
FIG. 3 is an opposite side view of the closed coffee filter bag from FIG. 2;
FIG. 4 is a right-side view based upon the orientation of FIG. 1;
FIG. 5 is a left side view based upon the orientation of FIG. 1;
FIG. 6 is a top view based upon the orientation of FIG. 1; and,
FIG. 7 is a bottom view based upon the orientation of FIG. 1.
The short broken lines showing of words and arrows are included for the purpose of illustrating portions of the article forming no part of the claimed design. The long broken dashed lines represent perforation/tear lines forming part of the claim.