That is, reply to the notice of examination opinions, and then modify the claim, or if someone else invalidates your case, you should reply to maintain your patent right, or reply to the notice of reexamination. I don't think I asked you to write an invalid request before.
It is aimed at a patent application or a topic derived from a patent.
The exam lasts 4 hours. I heard that it is best not to rush to write, but to spend half the time, or at least more than an hour, reviewing the topic, finding out different technical characteristics and thinking about what to do.
Pay attention to the neatness of the next volume, and there are also scores.