Kimble v. Marvel Entertainment, LLC
Headline: Court declines to overturn a long-standing rule barring patent owners from charging royalties after patent expiration, upholding limits that make ongoing post-patent royalties unenforceable and affecting patent licensors and licensees nationwide.
Holding: The Court refused to overrule Brulotte and held that patent owners cannot enforce royalty payments for use of an invention after the patent term expires, leaving post-expiration royalties generally unenforceable.
- Makes post-patent royalties generally unenforceable for licensors and licensees.
- Pushes parties to use alternative payment or licensing structures rather than indefinite royalties.
- Leaves Congress as the primary avenue to change post-expiration royalty rules.
Summary
Background
An inventor named Stephen Kimble obtained a 1990 patent for a toy that shoots foam "webs." After a dispute with a company that sold a similar "Web Blaster," the parties settled: Marvel bought the patent for a lump sum and agreed to pay 3% royalties on future sales with no end date. Marvel later relied on the Court's earlier Brulotte decision, which bars royalties for use of an invention after its patent expires, and sought a court order to stop payments after the patent term ended; lower courts cut off the royalty clause.
Reasoning
The Court considered whether to overrule Brulotte and refused. The majority stressed stare decisis (respect for precedent), explained that Brulotte rests on the statutory design that patents expire after a set term, and said Congress—not the Court—should change that rule. The opinion emphasized simplicity and predictability, noted business workarounds, and warned that replacing Brulotte with a fact-driven antitrust-style test would increase litigation and uncertainty.
Real world impact
The decision leaves in place a bright-line rule: royalties tied to post-patent use are generally unenforceable, affecting inventors, companies that license technology, and ongoing deals that omitted end dates. Parties can use alternative payment arrangements or seek legislative change. The Supreme Court affirmed the lower-court outcome in this dispute.
Dissents or concurrances
Justice Alito dissented, arguing Brulotte is based on flawed economics, upsets contractual expectations, and discourages innovation, and he urged overruling the decision.
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