Which document can be petitioned for reconsideration with additional fees in a PCT application?

In the context of a Patent Cooperation Treaty (PCT) application, a restriction requirement refers to a situation where the International Searching Authority (ISA) determines that the application encompasses multiple inventions or groups of inventions. The ISA may require the applicant to limit the application to a single invention, allowing the applicant to proceed with one invention while addressing the remaining ones through subsequent applications.

A petitioner can submit a request for reconsideration of this restriction requirement, potentially accompanied by additional fees. This is an important procedural aspect as it allows applicants the chance to contest an ISA's decision regarding how many inventions can be included in a single application.

Other documents listed, such as the international application itself, patent claims, or the applicant's oath, do not have the same provision for reconsideration with additional fees. The international application is fundamental to the PCT process and does not typically allow for a petition for reconsideration in the same way. Patent claims may be amended or argued against during examination, but they do not undergo a formal petitioning process similar to a restriction requirement. Lastly, the applicant's oath is a required declaration for submitting the application, but it is not subject to request for reconsideration in the same manner. Thus, the restriction requirement stands out as the only