The blank period is the blind search period. The blind search period is a vacuum period caused by the lag in the search system after the Trademark Office accepts a trademark application. It usually lasts about 4 months. Trademarks registered during this period cannot be searched. That is to say, if someone has registered the same trademark as yours during this period, it will not be found during the query, so registering a trademark cannot guarantee a successful application 100 times. This is related to the total number of trademark applications nationwide and the work efficiency of the Trademark Office, and is inevitable for a long time. Of course, the Trademark Office is also constantly improving efficiency and striving to shorten the time of the trademark application process.