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Case / Trial ID Number
Jurisdiction Code
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Category
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Patent
Trademark
Copyright
Design
Filing Date
Decision Verdict Date
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 patent on modified PH20 hyaluronidase enzymes, arguing the claims lack adequate written description and enablement. The petition cites extensive expert analysis and prior‑art exhibits to show undue experimentation would be required to identify the claimed mutants.
Outcome / Ruling
Verdict Document PDF URL
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