What are the specific provisions on the payment period of patent fees?

Legal analysis: the annual patent fee is paid in the year when the patent right is granted according to the application date, and should be paid within the time limit specified in the notice of granting patent right issued by the Patent Office, and the subsequent annual fee should be paid in advance within one month before the expiration of the previous year. If the payment is not made within one month before the expiration, the Patent Office will grant a grace period of one month. If the fee is not paid within one month after the expiration, there will be a late fee.

Legal basis: Article 95 of the Detailed Rules for the Implementation of the Patent Law of People's Republic of China (PRC), the applicant shall pay the application fee, publication and printing fee and necessary application surcharge within 2 months from the date of filing or within/0/5 days from the date of receiving the acceptance notice; If it fails to pay or pay in full at the expiration of the time limit, its application shall be deemed to be withdrawn. Where the applicant claims the priority, he shall pay the priority claim fee at the same time as the application fee; Failure to pay or pay in full at the expiration of the time limit shall be deemed as failure to claim priority.