legal ground
Article 99 of the Detailed Rules for the Implementation of the Patent Law of People's Republic of China (PRC) stipulates that the fees for restoring rights shall be paid within the relevant time limit stipulated in these Detailed Rules; Failing to pay or pay in full at the expiration of the time limit shall be deemed as not making a request.
The request fee for extending the time limit shall be paid before the expiration of the corresponding time limit; Failing to pay or pay in full at the expiration of the time limit shall be deemed as not making a request.
Description item change fee, patent evaluation report request fee and invalidation request fee shall be paid within 1 month from the date of filing the request; Failing to pay or pay in full at the expiration of the time limit shall be deemed as not making a request.