Rule 75: Revocation action and subsequent infringement action in a local or regional division (Article 33(5) of the Agreement)
If the intention of the opponent of the patent proprietor is only to defend himself against an infringement action, he will wait until the patent proprietor asserts that patent against him. Even if the patent proprietor asserts the patent, it may not be sufficient reason for him to lodge an isolated revocation action. The costs of an isolated attack on the patent will appear to be too high, compared with the value of the legal security gained by revocation of the patent, if the patent proprietor decides not to lodge an infringement action against him. The alleged patent infringer does not lose any opportunity if he does not lodge a revocation claim at the time the patent proprietor asserts the patent against him. He can raise a Counterclaim for revocation if the patent proprietor decides to lodge an infringement action. Therefore, the alleged patent infringer can stop and wait until the patent proprietor lodges an infringement action.