The ornamental design for a deepfryer, as shown and described.
FIG. 1 is a front elevational view of a deep fryer showing our new design,
the rear elevational view being identical thereto except for the absence
of the control device;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and
FIG. 4 is a right-side elevational view thereof, the left-side elevational
view being a mirror image thereof except for the absence of the receptacle
.