Chair backrest

Description

FIG. 1 is a front perspective view of a chair backrest, showing we new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an enlarged detail view of area 9 in FIG. 1;

FIG. 10 is an enlarged detail view of area 10 in FIG. 2; and,

FIG. 11 is an enlarged detail view of area 11 in FIG. 2.

The broken lines in the drawings illustrate the portions of the chair backrest, which form no part of the claimed design.

The dash-dot-dash broken lines encircling the enlarged views are for annotative purposes only and form no part of the claim thereof.

Claims

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