What is the legal status of patent?

Legal status includes: grant of patent right, patent application right, invalidation of patent right, termination of patent right, restoration of patent right, pledge, preservation and dissolution of patent right, filing of patent license contract, compulsory license for patent exploitation and change of name, nationality and address of patentee.

The retrieval of patent legal status refers to the timeliness and regional retrieval of patents, which can be divided into: patent validity retrieval and patent regional retrieval. Patent validity retrieval refers to the retrieval of the current status of a patent or patent application, with the purpose of knowing whether the patent is valid or not. Patent regional retrieval refers to the retrieval of patents applied for by an invention in those countries and regions, with the purpose of determining the national scope of the patent application.