The patent has passed the preliminary examination and has the application number. How to query whether the patent really passed the preliminary examination according to the given application number?

The Patent Office shall issue a notice of preliminary examination according to the address where you submit your application. If you receive this notice, it will prove that the first trial has definitely passed, so there is no doubt.

The follow-up is to pay the actual examination fee within 3 years and enter the substantive examination after publicity.

Now our bureau has set up a "call center". If you call 62085599 during working hours, someone will answer.