In recent years, in order to speed up the examination, the U.S. Patent Office has launched a series of procedures to speed up the examination, including accelerated examination, priority examination, patent prosecution expressway, first-instance meeting and so on. The United States Patent and Trademark Office provides an accelerated examination procedure to speed up the examination process of some applications. Accelerate the examination of applications for invention patents and design patents. To apply for accelerated review, the applicant must first submit a request for accelerated review and pay the corresponding fees. Many accelerated review periods are shorter than regular review periods. After the request for accelerated review is approved, the examiner usually starts the review within two weeks. The examiner can communicate with the applicant by telephone and solve the problems in the application as soon as possible. If the examiner issues an examination opinion, the applicant must give a reply within 1 month, which cannot be extended (in the conventional examination, the period is usually 3 months, which can be extended to 6 months). If the applicant fails to give a reply within 1 month, the application will be regarded as abandoned, not turned into a regular application. The application should be finally processed within 12 months. The so-called final treatment includes issuing a notice of approval, issuing a final opinion, the applicant appealing, the applicant proposing to continue the examination, or giving up the application. Applicants should also submit supporting documents to speed up the review and analysis of search results. The analysis should indicate which claims are disclosed in each existing document. According to the retrieved existing literature, the reasons why each claim can be patented are expounded. Accelerated examination provides a way to obtain patents quickly and has a high approval rate. Its disadvantage is that the applicant needs to do a lot of work, such as pre-trial retrieval, analysis of retrieval results, and accelerated examination and preparation of supporting documents.