(1) The applicant for or proprietor of a European patent who, in spite of all due care required by the circumstances having been taken, was unable to observe a time limit vis-à-vis the European Patent Office shall, upon application, have his rights re-established if the non-observance in question has the direct consequence, by virtue of this Convention, of causing the refusal of the European patent application, or of a request, or the deeming of the European patent application to have been withdrawn, or the revocation of the European patent, or the loss of any other right or means of redress.
(2) The application must be filed in writing within two months from the removal of the cause of non-compliance with the time limit. The omitted act must be completed within this period. The application shall only be admissible within the year immediately following the expiry of the unobserved time limit. In the case of non-payment of a renewal fee, the period specified in Article 86, paragraph 2, shall be deducted from the period of one year.
(3) The application must state the grounds on which it is based, and must set out the facts on which it relies. It shall not be deemed to be filed until after the fee for re-establishment of rights has been paid.
(4) The department competent to decide on the omitted act shall decide upon the application.
(6) Any person who, in a designated Contracting State, in good faith has used or made effective and serious preparations for using an invention which is the subject of a published European patent application or a European patent in the course of the period between the loss of rights referred to in paragraph 1 and publication of the mention of re-establishment of those rights, may without payment continue such use in the course of his business or for the needs thereof.
(7) Nothing in this Article shall limit the right of a Contracting State to grant restitutio in integrum in respect of time limits provided for in this Convention and to be observed vis-à-vis the authorities of such State.