I claim, the ornamental design for a cooking pan for use in heating cookers, as shown and described.
FIG. 1 is a top and front perspective view of a cooking pan for use in heating cookers, showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an exploded reference perspective view showing how two partial cooking pans of the cooking pan for use in heating cookers are assembled with and disassembled from each other in the arrow direction.