What is the main process of patent application in the United States?

1. Submit a US patent application: After the application is submitted, the USPTO will issue a formal receipt.

2. Formal examination of American patents: After the formal examination is passed, USPTO will issue a formal official acceptance notice.

3. Publicity: after examination, it will be published automatically within 18 months from the application date or priority date, or within 18 months from the application date according to the requirements of the applicant.

4. Substantive review: Generally, review opinions will be issued within 12 to 18 months. If rejected, the applicant will give a reply within 3 months from the date of receiving the notice.

5. American patent registration procedures: If there is no reason for rejection after examination, a notice of authorization will be issued, and the applicant will go through the patent registration procedures and pay the registration fee within 3 months from the date of receiving the notice.