Office chair base

Description

FIG. 1 is a perspective view of an office chair base showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The broken line showing in FIG. 2 are for the purpose of illustrating the environment of the design and form no part of the claimed design.

Claims

The ornamental design for an office chair base, as shown and described.