How does one know if a petition to the Director to review the denial of certification of an international application has been filed by an applicant and processed by the USPTO?

By using the USPTO Reference Number assigned to an international application, information concerning an international application may be obtained in Trademark Status and Document Retrieval (TSDR) under the section titled “Madrid History” on the “Status” tab. Use the “Documents” tab of TSDR to view the actual petition that was filed and the processing documentation issued by the USPTO in granting or denying the petition.