Legal analysis: the limitation of action for infringement of intellectual property rights is 2 years, counting from the date when the obligee knows or should know. The people's court shall order the defendant to stop the infringement if the right holder of the patent right, trademark right or copyright has sued for more than 2 years and the intellectual property right is still within the protection period; The amount of compensation for infringement damages shall be calculated for two years from the date when the obligee brings a lawsuit to the people's court.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 188 The limitation of action for requesting the people's court to protect civil rights shall be three years. Where there are other provisions in the law, those provisions shall prevail.

The limitation period of action shall be counted from the date when the creditor knows or should know that the right is damaged and the debtor knows it. Where there are other provisions in the law, those provisions shall prevail. However, the people's court shall not protect the rights that have been damaged for more than 20 years. Under special circumstances, the people's court may decide to extend the time according to the application of the obligee.

Article 189 Where the parties agree to perform the same debt by installments, the limitation period of action shall be counted from the date when the last installment expires.

Article 192 Upon the expiration of the limitation of action, the debtor may raise a defense of non-performance.

After the expiration of the limitation period of action, if the debtor agrees to perform it, it shall not defend itself on the grounds of the expiration of the limitation period of action; If the debtor voluntarily performs, it may not request the return.

Article 193 A people's court may not apply the limitation of action on its own initiative.