Where payment of an annual fee is not made by the normal due date, a warning shall be sent to the owner of the patent application or patent stating that he shall incur the forfeiture of his rights if such payment, together with that of the late fee, is not made before the expiry of the six-month period provided for in the first paragraph of article R. 613-47.
The absence of a warning does not engage the responsibility of the Institut national de la propriété industrielle and does not constitute a cause for restoration of the patent owner’s rights.