The ornamental design for molded concrete patio stone, as shown and described.
FIG. 1 is a perspective view of an embodiment of a molded concrete patio stone having a false joint and spacers shown in broken lines, the broken lines forming no part of the design sought to be patented;
FIG. 2 is a front view of the patio stone of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 3 is a rear view of the patio stone of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 4 is a right side view of the patio stone of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 5 is a left side view of the patio stone of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented;
FIG. 6 is a top view of the patio stone of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented; and,
FIG. 7 is a bottom view of the patio stone of FIG. 1, the portions shown in broken lines forming no part of the design sought to be patented.