The ornamental design for the patio cover gutter, as shown and described.
FIG. 1 is a left end elevation view of a first embodiment of a patio cover gutter;
FIG. 2 is a front elevation view;
FIG. 3 is a right end elevation view;
FIG. 4 is a rear elevation view;
FIG. 5 is a bottom plan view;
FIG. 6 is a top plan view; and
FIG. 7 is a top interior perspective view; and,
FIG. 8 is a top interior perspective view of a second embodiment of a patio cover gutter.
The patio cover gutter shown in FIG. 8 is shown with a symbolic break in its length. The appearance of any portion of the patio cover gutter between the break lines forms no part of the claim.