The period referred to in the last paragraph of Article L. 613-23-2 shall be four months.
The date of the end of the investigation phase referred to in the same paragraph is notified without delay to the parties by the Director General of the National Institute of Industrial Property. This date shall occur if no party has submitted observations on the expiry of the time limits mentioned in 2° or 3° of Article R. 613-44-6 and, at the latest, on the day on which oral observations are submitted.