FIG. 1 is a top, front and side perspective view of an inflatable seat cushion showing our new design with the front and side flaps folded up as in use;

FIG. 2 is top plan view of of FIG. 1;

FIG. 3 is a bottom plan view of FIG. 1;

FIG. 4 is a front elevational view of FIG. 1,

FIG. 5 is the right side elevational view of FIG. 1;

FIG. 6 is the left side elevational view of FIG. 1;

FIG. 7 is a top, front and side perspective view of the inflatable seat cushion with the front and side flaps folded up and shown in an unclaimed foam base to illustrate environment;

FIG. 8 is a top plan view of FIG. 7;

FIG. 9 is a front elevational view of FIG. 7;

FIG. 10 is a right side elevational view of FIG. 7;

FIG. 11 is a left side elevational view of FIG. 7;

FIG. 12 is a top, front and side perspective view of the inflatable seat cushion with the front and side flaps unfolded;

FIG. 13 is a front elevational view of FIG. 12;

FIG. 14 is a right side elevational view of FIG. 12; and,

FIG. 15 is a left side elevational view of FIG. 12.

The views in the drawings are shown on different scales.

All broken lines are for illustrative purposes only, and form no part of the claimed design.