(1) It was exhibited for the first time at an international exhibition sponsored or recognized by the China Municipal Government;
(2) It was first published at a specific academic conference or technical conference;
(3) Others disclose the contents of the application without the consent of the applicant.
The difference between grace period system and priority system is as follows:
1. The effect of priority is to apply by yourself and then apply.
2. Grace period is valid for new inventions. However, due to international exhibitions, academic conferences or illegal publicity by others (in line with Article 24 of the Patent Law), it is a grace period to file a patent application for invention-creation.
Extended data:
Patent priority refers to the patent applicant who filed a patent application for his invention-creation in a certain country for the first time, and then filed a patent application with the same theme in China within the statutory time limit.
The date of the first patent application is regarded as the date of the later application, and the rights enjoyed by the patent applicant according to law are the priority. The purpose of patent priority is to exclude the possibility that anyone who plagiarizes this patent in other countries may first apply and get registered.
Article 29 of the Patent Law stipulates that an applicant shall file an application for a patent for invention or utility model for the first time in a foreign country within twelve months, or file an application within six months from the date when a foreign country first files an application for a patent for design.
Where a patent application for the same subject is filed in China, the foreign country may enjoy the priority according to the agreement signed with China or the international treaty to which * * * is a party, or according to the principle of mutual recognition of priority.
An applicant who files an application for a patent for invention or utility model with the administrative department for patent in the State Council within 12 months from the date when he first filed an application in China may enjoy priority.
Baidu Encyclopedia-Patent Law