Retrofit Casement Mainframe

FIG. 1 is an isometric front view of a retrofit casement mainframe showing my new design.

FIG. 2 is a top view of the retrofit casement mainframe of FIG. 1 .

FIG. 3 is a bottom view of the retrofit casement mainframe of FIG. 1 .

FIG. 4 is a front view of the retrofit casement mainframe of FIG. 1 .

FIG. 5 is a rear view of the retrofit casement mainframe of FIG. 1 .

FIG. 6 is a left side view of the retrofit casement mainframe of FIG. 1 ; and,

FIG. 7 is a right side view of the retrofit casement mainframe of FIG. 1 .

The retrofit casement mainframe is shown with a symbolic break in its length. The appearance of any portion of the retrofit casement mainframe between the dash-dash break lines forms no part of the claimed design.