The US Court of Appeals for the Seventh Circuit affirmed that welfare benefit plans that bought the drug Humira did not have valid antitrust claims against the patent owner. The Court found that amassing patents by itself is not enough to give rise to an antitrust claim, and that the welfare benefit plans would need to prove that the patents were invalid. Mayor and City Council of Baltimore, et al. v. AbbVie Inc., et al., Case No. 20-2402 (7th Cir. Aug. 1, 2022) (Easterbrook, Wood, Kirsch, JJ.)

AbbVie owns a patent covering Humira, which is a drug used to treat arthritic and inflammatory diseases. Humira is not covered by the Hatch-Waxman Act because it is a biologic drug, rather than a synthetic drug. Biologics are covered by the Biologics Price Competition and Innovation Act (BPCIA), under which a competitor must ask the US Food and Drug Administration for permission to sell a “biosimilar” drug based on certain guidelines. From the first sale of the original drug, the competitor must wait 12 years to enter the market. If the original drug seller believes that a patent blocks competition and initiates litigation, the competitor is still free to sell its biosimilar drug. The competitor sells at risk of an adverse outcome in the litigation.

The original Humira patent expired in 2016, but AbbVie obtained 132 additional patents related to the drug. After the 12-year BPCIA requirement passed, none of AbbVie’s competitors chose to launch a biosimilar. Instead, competitors settled with AbbVie on terms to enter the US market in 2023. In exchange, AbbVie agreed that enforcement of all 132 of its patents would end in 2023 even if they were not set to expire.

Welfare benefit plans that pay for Humira on behalf of covered beneficiaries accused AbbVie of violating Sections 1 and 2 of the Sherman Antitrust Act. The payors argued that AbbVie’s settlements with potential competitors established a conspiracy that restrained competition in violation of Section 1, and that AbbVie’s “patent thicket” allowed AbbVie to reap unlawful monopoly profits from Humira after expiration of the original patent in violation of Section 2. The district court dismissed the complaint. The payors appealed.

The issue on appeal with respect to Section 2 was whether the payors had to prove that all of AbbVie’s Humira-related patents were invalid. Under the Walker Process antitrust doctrine, a party may be liable for an antitrust violation if it knowingly asserts a fraudulently procured patent in an attempt to monopolize a market. The payors did not argue that all 132 of AbbVie’s patents were fraudulent. The Seventh Circuit reasoned that because the patent laws do not set a cap on the number of patents a person (or company) can hold, the payors would need to prove that each of AbbVie’s 132 Humira-related patents were invalid to succeed in showing a violation under Section 2. Not only did the payors fail to prove that all 132 patents were invalid, but they did not even offer to do so. The Court thus agreed with the district court that AbbVie did not amass a patent thicket to maintain monopoly profits from Humira.

The issue on appeal with respect to Section 1 was whether AbbVie’s settlements with potential biosimilar competitors were anticompetitive. The Seventh Circuit found that the payors could have a Section 1 claim if they were injured by the terms of AbbVie’s settlements with its competitors (for example, by showing that AbbVie overpaid a competitor to defer entry). The terms of AbbVie’s settlements allowed the competitors immediate entry to the European market, and AbbVie agreed to US market entry before its last Humira-related patents expired. The Court found that those terms, as well as the payors’ failure to show that AbbVie overpaid the competitors to delay their entry, rendered the settlements lawful.

The Seventh Circuit therefore affirmed the district court’s dismissal.