A231001 is not a patent number.
The patent number before 2002 is divided into four paragraphs: For example: 97101765.4 The first two paragraphs represent the year when the patent application was filed. For example, "97" indicates an application filed in 1997; the second paragraph consists of the third digit, indicating the type of patent application, "1" indicates invention (if "2" indicates utility model, "3" indicates design," 8" is PCT invention patent application, "9" is PCT utility model patent application); the third paragraph consists of the fourth to eighth digits, indicating the serial number of such applications in that year, for example, 01765 means 1765 applications in that year; the fourth paragraph It consists of a number or symbol in the ninth position, which is a check digit automatically generated by the computer. It can be any number from 0 to 9, or the character X, such as "4" in the example.
Since 2002, the basic format of the patent number is 200210000001.1. The first paragraph 2002 represents 2002; the second paragraph consists of the fifth digit, indicating the type of application; the third paragraph consists of the sixth to tenth digits. It consists of two digits, representing the serial number of applications in this category that year (the increase in digits represents the increase in the number of applications in recent years, which is really gratifying and encouraging; on the other hand, it does increase the workload and time of the Intellectual Property Office. Extended); the fourth segment consists of the last digit or symbol, which is a check digit automatically generated by the computer and given by the computer.
The patent number of an authorized patent is the patent number on the authorization certificate issued by the State Intellectual Property Office, which is the application number plus ZL. For example, the patent number of a certain authorized patent is ZL200310100002.