When is the publicity period of utility model patent?

When is the publicity period of utility model patent? There will be a corresponding publicity period for patent applications. Our utility model patent and appearance patent are different from invention patents. There is only one publicity period for utility model patents and appearance patents, that is, the announcement of the completion of the preliminary examination of patents. There will be two publicity periods for invention patents, because they need to go through substantive examination, one is publication and the other is announcement. When is the publicity period of utility model patent? The application documents for utility model shall include: the request for a patent for utility model, the specification, the appended drawings of the specification, the patent claim, the abstract and the appended drawings. An application for a patent for utility model must have a description and drawings. Where a patent agency is entrusted, a power of attorney shall be submitted. To apply for fee reduction, an application for fee reduction and corresponding supporting documents shall be submitted. The utility model patent is only a preliminary examination, and there is no substantive examination like the invention patent application. It mainly examines whether the application for a patent for utility model has the documents and other necessary documents stipulated in Article 26 of the Patent Law, and whether these documents conform to the prescribed format. When the utility model is authorized, it will be published. Generally, if there is no problem, you can be informed to go through the authorization formalities about 5~6 months after the application is accepted, and the patent infringement will be officially authorized and announced about 1 month after the application is completed. The period from the date of application to the date of authorization announcement is the same as that of the invention patent from the date of application to the date of publication. Rights can only be protected after the date of authorization announcement, otherwise it may be invalid by others. What needs to be further explained is that the utility model patent is much more likely to be invalid than the invention patent because it has not been substantially examined; So sometimes it is necessary to prepare for patent defense examination.