The ornamental design of a top entrycatlitterbox, as shown and described.
FIG. 1 is a front perspective view of the top entry cat litter box of the present design.
FIG. 2 is a front elevation view of the top entry cat litter box of FIG. 1.
FIG. 3 is a rear elevation view of the top entry cat litter box of FIG. 1.
FIG. 4 is a left side elevation view of the top entry cat litter box of FIG. 1.
FIG. 5 is a right side elevation view of the top entry cat litter box of FIG. 1.
FIG. 6 is a top plan view of the top entry cat litter box of FIG. 1; and,
FIG. 7 is a bottom plan view of the top entry cat litter box of FIG. 1.
The broken lines showing the structural reinforcement ribs on the bottom surface of the litter box and the paw designs on the front and sides of the litter box form no part of the claimed design.