When can you amend an international application?

Amending an international application can occur specifically by the Written Opinion deadline. This is important because the Written Opinion serves as an initial evaluation of patentability by the International Searching Authority (ISA). Amendments can be made to an application in response to this preliminary feedback, allowing the applicant to clarify or modify their claims to align better with patentability standards.

Additionally, after receiving the Written Opinion, applicants can strategically decide how to address any objections or issues raised, potentially strengthening their application before entering the national phase. The ability to amend by this deadline emphasizes the procedural framework established by the Patent Cooperation Treaty (PCT), aimed at facilitating the patent application process across multiple jurisdictions.

Other options imply a broader or different context for amendments that do not align with the PCT guidelines. For instance, suggesting amendments anytime before filing is misleading, as certain rules regarding amendments become specific once the application has been filed and the examination process is engaged.