How long is the term of use of the patent?

1. According to the provisions of Article 42 of the Patent Law of People's Republic of China (PRC), the duration of the patent right is calculated from the date of application, and the duration of the invention patent is 20 years; The term of utility model patent and design patent is 10 year.

2. Only the patent application number has no patent number, indicating that the patent has not been applied. Only China National Intellectual Property Administration has given the notification of patent application acceptance and the patent application number, requiring the patent number to be legally protected.

Extended data

1. Article 44 of the Patent Law of People's Republic of China (PRC) stipulates that in any of the following circumstances, the patent right shall be terminated before the expiration of the time limit:

(1) Failing to pay the annual fee as required;

(2) The patentee waives his patent right in writing.

Where the patent right is terminated before the expiration of the term, it shall be registered and announced by the patent administration department of the State Council (China National Intellectual Property Administration).

2. The difference between patent application number and patent number is as follows:

Application number: When the patent applicant filed a patent application in China National Intellectual Property Administration, China National Intellectual Property Administration gave the patent application acceptance notice and patent application number.

Patent number: After the patent applicant obtains the patent right, the patent number on the patent certificate issued by China National Intellectual Property Administration is ZL (patent initials)+application number.