FIG. 1 is a front, right and top perspective view of a window curtain rod, showing my new design;
FIG. 2 is a rear, left and bottom 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 an enlarged top plan view thereof;
FIG. 8 is an enlarged bottom plan view thereof;
FIG. 9 is a front, right and top perspective view of a window curtain rod in a use status;
FIG. 10 is an enlarged view of portion 10 shown in FIG. 1;
FIG. 11 is an enlarged view of portion 11 shown in FIG. 1; and,
FIG. 12 is an enlarged view of portion 12 shown in FIG. 1.
The dot-dash broken lines depict the boundaries of the enlargements that form no part of the claimed design.