The ornamental design for a rigid pulltab, as shown and described.
FIG. 1 is a front perspective view of a first embodiment of a rigid pull tab showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a front perspective view of a second embodiment of a rigid pull tab showing further aspects of our new design;
FIG. 9 is a front elevational view thereof;
FIG. 10 is a rear elevational view thereof;
FIG. 11 is a right side elevational view thereof;
FIG. 12 is a left side elevational view thereof
FIG. 13 is a top plan view thereof; and,
FIG. 14 is a bottom plan view thereof.
The broken line portions showing surface cavities and through-holes in FIGS. 1-3, 6, and 8-10 and 7 are shown to illustrate environment only and form no part of the claimed design.