How long has the description of the invention patent changed the fastest?

The description items of invention patents change the fastest for one month. According to the relevant laws and regulations, the fee for specification change, the fee for patent evaluation report request and the fee for invalidation request shall be paid within 1 month from the date of filing the request. If the party concerned fails to pay, it shall be deemed as not having applied.

legal ground

Article 99 of the Detailed Rules for the Implementation of the Patent Law of People's Republic of China (PRC)

The fee for the request for restoration of rights shall be paid within the corresponding time limit stipulated in these 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.