The ornamental design for a apron, as shown and described.
FIG. 1 is a perspective view of an apron, shown positioned around a user's waist, showing my new design;
FIG. 2 is a perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a side elevational view thereof.
The indicia or broken lines shown on the figures are for illustrative purposes only and are hereby disclaimed as forming no part of Applicant's claimed invention.
The broken lines shown in FIGS. 1–7 are included for the purpose of illustrating environmental structure and form no part of the claimed design.