The ornamental design for an paperproduct with surfacepattern, as shown and described.
The sole FIGURE is a top plan view of a paper product with surface pattern embodying my design.
The broken lines surrounding the design represent the boundaries of the paper product with surface pattern and form no part thereof. The surfaces or portions not shown in the drawing or described in the specification form no part of the claimed design. The thickness of the paper product with surface pattern forms no part of the claim.