The review period expired. Did you receive a deemed withdrawal notice during the review period?
There are many possibilities for deeming it to be withdrawn after it is made public. The following are several situations in which an invention patent application is deemed to have been withdrawn during the application stage:
1. When the substantive examination deadline has expired (three years from the application date or priority date), the substantive examination fee should be paid for the substantive examination However, failure to pay the actual examination fee will be deemed to be withdrawn;
2. The examiner issues a notice of examination opinion, and failure to respond within the time limit will be deemed to be withdrawn;
3. The examiner issues a notice of examination opinion Failure to respond to the notice of amendment within the time limit shall be deemed to have been withdrawn.
I can think of these situations for now, welcome to add~~~