The period open to the employer to claim the right of attribution is four months, unless otherwise agreed between the parties which can only be subsequent to the declaration of the invention.
This period runs from the date of receipt by the employer of the declaration of the invention containing the indications provided for in articles R. 611-2 (1° and 2°) and R. 611-3 or, in the event of a recognised and justified request for additional information, the date on which the declaration was completed.
A claim to the right of attribution is made by sending the employee a communication specifying the nature and extent of the rights that the employer intends to reserve for itself.