What is the extension of patent defense examination opinions?

The applicant may request the Patent Office to extend the specified reply period. However, the request for extension of the time limit shall be made before the expiration of the time limit. After receiving the applicant's reply, the Patent Office may start the follow-up examination procedure. If the notice or decision of the follow-up review procedure has been issued, the examiner will no longer consider the reply submitted by the applicant within the original reply period.