The ornamental design for a ceilingplate, as shown and described.
FIG. 1 is a bottom perspective view of a ceiling plate depicting a new design;
FIG. 2 is a top perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a back elevational view thereof;
FIG. 5 is a left elevational view thereof;
FIG. 6 is a right elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a bottom perspective view including example optional environmental structure;
FIG. 10 is a bottom perspective view including another example of optional environmental structure; and,
FIG. 11 is a bottom perspective view including yet another example of optional environmental structure.
The broken lines at the top surface of the ceiling plate in the views represent portions of the ceiling plate that form no part of the claimed design. The remaining broken lines depict environmental structure which forms no part of the claimed design.