Legal analysis: Without the need to declare a patent through a patent agency, a patent certificate can be obtained in 11-15 days after the patent is authorized. Under the premise that the agency has applied for a patent, after the patent is authorized, the intermediary agency will get the patent certificate in 11-15 days and then mail it to the applicant. It will take an additional 1-3 days.
Legal basis: "Patent Law of the People's Republic of China"
Article 28 The date when the Patent Office receives the patent application documents is the filing date. If the application documents are mailed, the postmark date shall be the date of application.
Article 29 Within 12 months from the date the applicant first files a patent application in a foreign country for an invention or utility model, or from the date a design first files a patent application in a foreign country, If a patent application is filed in China on the same subject within 6 months, the foreign country may enjoy the right of priority in accordance with the agreement signed by the foreign country with China or the international treaty both parties are a party to, or in accordance with the principle of mutual recognition of priority. If the applicant files another patent application for the same subject with the Patent Office within 12 months from the date of first filing a patent application for an invention or utility model in China, the applicant may enjoy priority.