Insights

Applicants entering the U.S. national phase of an international (PCT) application have two options: enter the national stage under 35 U.S.C. §371 or file a “bypass” national application under 35 U.S.C. § 111(a). A bypass application allows applicants to file a new U.S. application that claims priority to the PCT application, treating the PCT application as a U.S. parent and bypassing the traditional national phase entry. Depending on the applicant’s goals and strategy, bypass applications can be filed as a continuation, divisional, or continuation-in-part (CIP).

On March 13, 2025, the United States Court of Appeals for the Federal Circuit issued a decision about Patent Term Extensions (PTEs) under the Hatch-Waxman Act for reissue patents. In Merck Sharp & Dohme B.V. v. Aurobindo Pharma USA, Inc. (No. 2023-2254), the Court confirmed that the PTE provision under 35 U.S.C. § 156 refers to the original patent’s issue date, not the reissue patent’s issue date. Thus, the issue date of the original patent should be used when calculating the extension period.