The ornamental design for an inkcartridge, as shown and described.
FIG. 1 is a front, top and left side perspective view of an ink cartridge showing our new design;
FIG. 2 is a rear, bottom and right side perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines inside the three recesses in FIGS. 1 and 5 represent the boundaries of the claimed design. The remaining broken line in the figures depict environmental subject matter only and form no part of the claimed design.