The ornamental design for a fireproofhangingfilefolder, as shown and described.
FIG. 1 is a perspective view of a fireproof hanging file folder showing our new design in a fully closed state;
FIG. 2 is a another perspective view thereof in a partially open state;
FIG. 3 is a top plan view of FIG. 1;
FIG. 4 is a left-side elevation view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a right-side elevation view thereof;
FIG. 7 is a rear elevation view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an elevation view of the fireproof hanging file folder in a flat state; and,
FIG. 10 is an opposite side elevation view thereof.
The broken lines shown in the drawings depict portions of the fireproof hanging file folder in which the design is embodied that form no part of the claimed design.