Ink cartridge

FIG. 1 is a front, side perspective view of an ink cartridge showing my new design;

FIG. 2 is a rear, side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is an additional left-side view thereof, shown in an expanded position.

The broken lines are environmental only and form no part of the claimed design. The dash-dot lines indicate boundaries of the claimed design, and form no part thereof.