The ornamental design for a slottedanglestanchion, as shown and described.
FIG. 1 is a perspective view of the slotted angle stanchion embodiment of the present invention;
FIG. 2 is a front view of the slotted angle stanchion from FIG. 1;
FIG. 3 is a right side view of the slotted angle stanchion from FIG. 1;
FIG. 4 is a back view of the slotted angle stanchion from FIG. 1;
FIG. 5 is a left side view of the slotted angle stanchion from FIG. 1;
FIG. 6 is a top view of the slotted angle stanchion from FIG. 1; and,
FIG. 7 is a bottom view of the slotted angle stanchion from FIG. 1.
Broken lines and unshaded portions contained within broken lines depict exemplary elements of the slotted angle stanchion that are shown for illustrative purposes only and that form no part of the claimed design.