What is the main purpose and significance of patent application reexamination?

Patent reexamination is the only remedy for patent rejection. If you don't want to lose your patent right and waste your technology in public, you must do a patent reexamination.

But most applicants like to ask, how sure is the patent reexamination? I want to say that the patent is a kind of protection for your own technology for the applicant, and the examination result is determined by many factors. It's not that the agent said he could catch the big one. Generally speaking, agents with more than 5 years of professional experience can basically analyze the reasons for a patent re-examination.

Specifically, there are some reply strategies specifically for the examiner's routine opinions, and you can have a private chat if you are interested.