The time limit for the first defense of invention patent is 4 months, the time limit for the second defense and subsequent defense is 2 months, and the time limit for each defense of utility model and appearance is 2 months. 15 days will be added when calculating the time limit, which is the estimated time of receipt.
It is particularly important to note that, for the priority examination of patent applications, the time limit for each defense of invention patents is 2 months, and the time limit for each defense of utility models and appearances is 15 days.