Paperboard chock

The design is the visual features of the PAPERBOARD CHOCK ASSEMBLY shown in the drawings, whether those features are features of one of shape, configuration, ornament or pattern or are a combination of any of those features. The portions shown in stippled lines do not form part of the design. Figure 1 is a perspective view of the PAPERBOARD CHOCK ASSEMBLY showing the new design; Figure 2 is a top view thereof; Figure 3 is a left side view thereof; Figure 4 is a right side view thereof; Figure 5 is a front side view thereof; Figure 6 is a back side view thereof; and Figure 7 is a bottom view thereof. Drawings of the design are included.