Cat litter box

FIG. 1 is a top perspective view of a cat litter box showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of portion 9 shown in FIG. 2 ;

FIG. 10 is an enlarged view of portion 10 shown in FIG. 4 ; and,

FIG. 11 is an enlarged view of portion 11 shown in FIG. 5 .

The dash-dash broken lines in the drawings depict the portions of the cat litter box that form no part of the claimed design. The dot-dash broken lines in the drawings depict the boundaries of the enlarged views that form no part of the claimed design.