Chair backrest

Description

FIG. 1 is a perspective view of a chair backrest showing my new design;

FIG. 2 is a rear perspective view of the design;

FIG. 3 is a front view of the design;

FIG. 4 is a rear view of the design;

FIG. 5 is a left side view of the design;

FIG. 6 is a right side view of the design;

FIG. 7 is a top view of the design;

FIG. 8 is a bottom view of the design; and,

FIG. 9 is another perspective view of FIG. 1. The broken lines showing the remainder of the chair are for illustrative purposes only and form no part of the claimed design.

Claims

The ornamental design for a chair backrest, as shown and described.