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Patent
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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 12,264,345, which claims thousands of modified PH20 hyaluronidase polypeptides. The petition alleges lack of written description, enablement, indefiniteness, and obviousness. The Board must decide whether to institute the proceeding.
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