Bathtub Enclosure

FIG. 1 is a front, top, right side perspective view of a bathtub enclosure showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front, bottom, left side perspective view thereof.

Broken lines represent portions of the bathtub enclosure that form no part of the claimed design. Broken lines associated with brackets indicate break lines and the appearance of any portion of the article between the break lines forms no part of the claimed design.