The ornamental design for a curvedsurfacescraper, as shown and described.
FIG. 1 is a perspective view of a curved surface scraper in accordance with the present invention;
FIG. 2 is a rear elevational view of the curved surface scraper;
FIG. 3 is a first side elevational view of the curved surface scraper; a second side elevational view being a mirror image of the first side elevational view;
FIG. 4 is a bottom plan view of the curved surface scraper;
FIG. 5 is a top plan view of the curved surface scraper; and,
FIG. 6 is a front elevational view of the curved surface scraper.