Patent applications are examined as to compliance with formal requirements.
Duration & Maintenance
A patent is valid for 20 years from filing date of application.
Maintenance fees are payable on pending applications, and are payable annually calculated from the filing date.
A six months grace period is provided, subject to payment of surcharges. If the renewal fee is not paid, the patent lapses.
A patent must be worked within four years from the date of filing, or three years from grant (whichever is earlier).
A court may grant a compulsory licence on the ground that the invention has not been worked in Tunisia.