What is the difference between patent application number, patent number, patent publication number and patent announcement number?

Patent application number and patent number: The patent application number is a number assigned by the Patent Office from the date of filing (that is, from the date when the patent application documents are submitted to the Patent Office). If the patent number is the same as the patent application number, it is called the patent application number before patent authorization and the patent number after authorization.

2. Patent publication number and patent publication number: in the process of patent application, before obtaining patent authorization, the number of the patent published by the State Patent Office is called patent publication number; When the patent authorization is announced, the patent office shall provide the patent announcement number. Patent announcement number and patent announcement number are serial numbers set by the patent office.

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The patent number is the only number where patent details can be found.