How long does it usually take for a patent to go from publication to actual examination?

After publication, it will enter the real trial. Soon, after the case enters the actual trial, you will first receive the "Notice of Entering the Actual Trial" to inform you that the relevant examiner has begun to hear your patent. After confirming the review text, the examiner decides whether to search according to the theme you invented. Then I will send you a notice of preliminary examination opinions. This process is generally short and controllable, taking 3~5 months. After receiving the call, you have four months to reply, and it is useless to reply too early, because the examiner will wait until four months later for retrial. Then there is the second level, and it is not easy to speculate on the time when personal experience receives the second level, because there is no provision in the review guide; You have two months to reply. After answering two questions, it is a possible three links and four links, and it is decided to refuse or authorize. This process is even more uncontrollable.