J 0006/91 (Correction - Priority declaration) du 01.12.1992

In principle, in the absence of any special circumstances, a request for correction of a priority claim by the addition of a first priority should be made sufficiently early for a warning to be included in the publication of the application. An exception to this rule may be allowed if it is apparent on the face of the published application that a first or only priority may be missing or wrong or that the date of a first or only priority is wrong. In such a case, the public interest is safeguarded by the fact that it was apparent from the published application that a mistake may have been or has been made with respect to the priority date claimed.