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Patent
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Filing Date
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Court / Tribunal
Bench / Panel Judges
Petitioner / Claimant (Plaintiff)
Merck Sharp & Dohme LLC
Respondent / Defendant
Halozyme, Inc. et al.
Dispute Summary
Merck has filed a post‑grant review petition challenging Halozyme’s U.S. Patent 12,049,652 covering engineered PH20 hyaluronidase proteins. The petition asserts lack of written description, lack of enablement, and obviousness of key mutants. The Board has not yet ruled on the petition.
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