The elements after uranium are called:

The elements after uranium are called transuranic elements

Transuranium elements are any chemical elements that appear in the periodic table after uranium. 

Any element having an atomic number more than 92 is considered to be transuranium. Only 26 items actually fall into this group. 

Neptunium and plutonium, which have atomic numbers 93 and 94, respectively, are the only ones of these that have been seen in nature.