MedImmune, Inc. v. Genentech, Inc.

Justice & alia

delivered the opinion of the Court.

We must decide whether Article Ill’s limitation of federal courts’ jurisdiction to “Cases” and “Controversies,” reflected in the “actual controversy” requirement of the Declaratory Judgment Act, 28 U. S. C. § 2201(a), requires a patent li*121censee to terminate or be in breach of its license agreement before it can seek a declaratory judgment that the underlying patent is invalid, unenforceable, or not infringed.

I

Because the declaratory-judgment claims in this case were disposed of at the motion-to-dismiss stage, we take the following facts from…