Also known as: preemption defences · pre-emption defense · preemption defenses · preemption · federal preemption
Written by attorneys · grounded in primary & secondary sources — see below
A defense asserting that federal law displaces state-law claims because Congress intended to occupy the field or because state requirements conflict with federal mandates.
Piper Patel operates a sports betting platform in a state that enacted a licensing scheme after federal law barred states from authorizing such activities. She sues state officials for refusing to process her application. The officials raise a preemption defense, but the court rejects it because the federal statute targeted state legislative action rather than private conduct.
Paula Pierce sues a former employee and his new employer for misappropriating manufacturing processes she developed. The defendants assert a preemption defense based on federal patent law. The court rejects the defense because state trade secret protection supplements rather than conflicts with patent policy.
Select any source to read its text and confirm it supports the definition.
Phoebe Park is injured in a car crash and sues the manufacturer for failing to install a more advanced airbag. The manufacturer raises a preemption defense citing federal safety standards that permitted the chosen design. The court accepts the defense because the federal standard preempts conflicting state tort duties.
Preston Pratt sues a television station for airing his name in connection with a crime report. The station raises a preemption defense grounded in federal constitutional protections for accurate reporting of public records. The court sustains the defense because federal rules override state privacy torts in that setting.
Priscilla Parks sues several utilities for contributing to climate change through greenhouse gas emissions. The defendants raise a preemption defense based on federal environmental statutes that regulate the same conduct. The court accepts the defense because federal law occupies the field and leaves no room for state common-law claims.
Paul Peterson sues a manufacturer for patent infringement over a specialized metal product. The defendant raises a preemption defense arguing that federal patent law displaces any conflicting state claim. The court accepts the defense and retains jurisdiction.
The defense applies when Congress has imposed a specific design requirement and intended to prevent states from imposing stricter or different standards. Courts examine the federal statute for evidence of that intent.
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No. State trade secret protection is not preempted when it addresses different subject matter and does not conflict with the objectives of the patent system.
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Congressional intent is the touchstone. A court must determine whether the federal statute was meant to occupy the field or to conflict with the state rule at issue.
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Usually not. Minimum standards leave room for state requirements that are more protective unless the statute expressly or impliedly precludes them.
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…which see Norfolk & Western Ry. v. Train Dispatchers , 499 U.S. 117, 111 S.Ct. 1156, 113 L.Ed.2d 95 (1991)—courts usually read preemption clauses to leave private contracts unaffected. American Airlines, Inc. v. Wolens , — U.S. —, 115 S.Ct. 817, 130 L.Ed.2d 715 (1995), provides a nice illustration. A federal statute preempts…