How to check the progress of PCT patent application? How to check it on WIPO website?

1. Submitting international applications Generally speaking, PCT applications should be submitted to the National Bureau as the PCT acceptance bureau. When applying for a PCT patent, the applicant must state in which member countries the application is valid. These designated countries are called "designated countries". China National Intellectual Property Administration, China, as the designated acceptance bureau of PCT, only accepts international applications submitted by citizens or residents of China. When there are multiple applicants for an international application, at least one applicant's nationality or residence is China. Chinese and English are accepted in China National Intellectual Property Administration, China. After accepting the PCT application, China National Intellectual Property Administration will formally review the application documents. If the patent application documents and procedures are complete, the international application date will be determined. International filing date means that the PCT international application has the same effect as ordinary domestic application in each designated country since the filing date, and this filing date has also become the actual filing date in the designated country. After examination and approval, the application documents will be sent to the International Bureau of the World Intellectual Property Organization and the international retrieval unit respectively. 2. International Retrieval International retrieval is a closed process, and there is no communication between the applicant and the retrieval unit except for single or obviously wrong questions. 9 months from the priority date, or 3 months from the retrieval unit receiving the retrieval book, whichever is later, the retrieval unit will make a retrieval report or announce that it will not make a retrieval report in some cases. The retrieval report or announcement will be transmitted to the International Bureau and the applicant. After 18 months from the date of international application (or priority date), the International Bureau will publish the PCT international patent application and the search report made by the international search unit, and send the application together with the search report to the patent office of the designated country required by the PCT patent application. 3. International Publication At the expiration of 18 months from the priority date, the International Bureau will publish the international application internationally, including pamphlets and bulletins. Publishing forms include paper and electronic parts. 4. International Preliminary Examination The Patent Cooperation Treaty stipulates that the international preliminary examination procedure is not mandatory. The international preliminary examination only puts forward preliminary opinions on whether the invention is novel, creative and practical, and its examination opinions are not binding on the designated countries. At this stage, the applicant can take the initiative to modify his application documents, or can receive written opinions from the international preliminary examination unit, and the applicant can state his own opinions or make amendments. After 28 months from the priority date, the international preliminary examination unit will prepare an international preliminary examination report and send it to the applicant and the International Bureau. 5. After the designated country completes the international phase, the international patent application enters the national (or regional) phase after the applicant initiates the application. The applicant must go through the formalities of entering the national phase of the designated country (or selected country) within 30 months (in some countries, it may be 20 months) from the priority date: pay the national fee and submit the translation of the international application translated into the national language. Because the laws and regulations of different countries are different, the time limit for some countries to enter the national phase will be later than 30 months (or 20 months).