The ornamental design for a paperproduct, as shown and described.
The sole FIGURE is a top plan view of a surface pattern of a paper product showing my new ornamental design. The “.-.-.” broken lines indicate one repeat unit of the design. The “..-..” broken lines form the boundary of the claimed sheet material and indicate no specific length and width. The design repeats uniformly throughout the length and width of the paper product, such as a sheet of a paper towel or tissue product. A specific length and width of the paper product forms no part of the claimed design. The broken lines in the figures represent unclaimed environmental matter. The surfaces or portions not shown in the drawings or described in the specification form no part of the claimed design.