FIG. 1 is a front elevation view of the office chair armrest showing my new design;
FIG. 2 is a rear elevation view thereof;
FIG. 3 is a left elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a front perspective view thereof;
FIG. 8 is a rear perspective view thereof; and
FIG. 9 is a front elevation view of a second embodiment of the office chair armrest showing my new design;
FIG. 10 is a rear elevation view thereof;
FIG. 11 is a left side elevation view thereof;
FIG. 12 is a right side elevation view thereof;
FIG. 13 is a top plan view thereof;
FIG. 14 is a bottom plan view thereof;
FIG. 15 is a front perspective view thereof; and,
FIG. 16 is a rear perspective view thereof.
The broken lines shown in the drawings represent portions of the office chair armrest that form no part of the claimed design.