The ornamental design for a scentcartridge, as shown and described.
FIG. 1 is a top, front, left side perspective view of the scent cartridge in the base of the new design.
FIG. 2 is a front elevation view of the scent cartridge in the base of the new design.
FIG. 3 is a rear elevation view of the scent cartridge in the base of the new design.
FIG. 4 is a right side elevation view of the scent cartridge in the base of the new design, the left side elevation view being a mirror image of the right side elevation view; and,
FIG. 5 is a bottom elevation view of the scent cartridge of the new design, the top elevation view being a mirror image of the bottom elevation view.
The broken lines showing portions of the scent cartridge are included for the purpose of illustrating portions of the article and form no part of the claimed design.