What year did the U.S. supreme court overturn the separate but equal law?

1954 . Separate but equal wasn't a law, but an method used in Jim Crow to keep people separated and unequal.Thurgood Marshal was the lawyer for the plaintiffs. He argued that the system of racial separation, while masquerading as providing separate but equal treatment of both white and black Americans, instead it perpetuated inferior accommodation, services, and treatment for black Americans. The suit called for the Topeka school district to reverse its policy of racial segregation. The Supreme Court used the 14th amendments equal protection clause to determine the operation of separate public schools for white and black students.