Prometheus Re-bound: Supreme Court Reverses in Mayo v. Prometheus Labs

In a much anticipated decision, a unanimous Supreme Court today reversed the ruling of the Federal Circuit Court of Appeals, and held that Prometheus’ process is not patent eligible. Mayo Collaborative Servs. v. Prometheus Labs., Inc., No. 2008-1403, slip. op. (Fed. Cir. Dec. 17, 2010), rev’d, 566 U.S. __ (2012). Mayo purchased and used medical diagnostic tests based on Prometheus Labs’ patents, but later sold and marketed its own diagnostic test. Prometheus Labs brought suit, asserting that Mayo’s test kits infringed its patents.