Patents enjoy multiple priorities. How to determine the "priority date" of patent application?

Priority principle is one of the principles of patent application. Include foreign priority and domestic priority. The main content of priority is that if an applicant applies for a patent for invention or utility model for the first time in a foreign country within twelve months, or applies for a patent for design for the first time in a foreign country within six months, and applies for a patent on the same subject in China, he can enjoy priority according to the agreement signed between the foreign country and China or the international treaties to which he 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. The former is foreign priority and the latter is domestic priority, which is different in the applicable patent types and application places. For example, if A applied for an invention patent in the United States on June 365438+1October 0, 2006, and he applied for a patent on the same subject in China on June 20, 2007, according to the agreement signed between the United States and China or the international treaties to which * * * is a party, or according to the principle of mutual recognition of priority, China takes the date of his application in the United States as the date of his application in China. That is, 65438+1October 3 1 200. If someone applied for a patent on the same subject in China from October 365438, 2006 to June 20, 2007, China National Intellectual Property Administration will not authorize it. Legal basis: Article 29 of the Patent Law of People's Republic of China (PRC). Where an applicant files a patent application for an invention or utility model in China within 12 months from the date when he first filed a patent application with a foreign country, or within 6 months from the date when he first filed an application for a patent for a design with a foreign country, he may enjoy the priority according to the agreement signed between the foreign country and China or the international treaties to which he 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.