What are the reasons for the different length of patent disclosure?

1. First of all, after the patent passed the preliminary examination, it was affected by various small factors such as typesetting and printing, which led to the extension of the publication period.

2. Secondly, the patent is not qualified in the first trial and needs to be revised.

3. Finally, the patent application of the enterprise is divided into cases to obtain a longer protection period, which takes a long time, thus prolonging the publication time of the patent application.