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Patent
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Petitioner / Claimant (Plaintiff)
United Therapeutics Corporation
Respondent / Defendant
Actelion Pharmaceuticals Ltd. et al.
Dispute Summary
United Therapeutics has filed an IPR petition seeking cancellation of all 57 claims of Actelion’s ’847 patent covering macitentan‑PDE5 inhibitor combinations for pulmonary hypertension. The petition alleges anticipation by Bolli and obviousness over Bolli‑Keyser and Hoeper‑Morice references, arguing that secondary considerations are irrelevant.
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