Portable chair

FIG. 1 is a top, front, right perspective view of a first embodiment of a portable chair showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a folded front view of an alternative claimed configuration of a portable chair showing our new design thereof;

FIG. 9 is a folded back view thereof;

FIG. 10 is a folded left side view thereof;

FIG. 11 is a top, front, left perspective photographic view of a second embodiment thereof;

FIG. 12 is a top, rear, left perspective photographic view of a third embodiment thereof;

FIG. 13 is a left side photographic view thereof; and,

FIG. 14 is a rear, left alternative photographic view thereof.

The broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof. The broken lines depicting the remainder of the portable chair form no part of the claimed design.