4. Kontoret sender ansøgerens bemærkninger til den indsigende part og opfordrer, såfremt det anser det for nødvendigt, ansøgeren til at svare inden for en af Kontoret fastsat frist.
(4) The observations filed by the applicant shall be communicated to the opposing party who shall be called upon by the Office, if it considers it necessary to do so, to reply within a period specified by the Office.