Patent infringement in the United States depends on the date of application or the date of certificate

Date of application. According to the query of the Intellectual Property Network, in the patent law, the grant of a patent is based on the date of filing. In the United States, the patentee does not own the patent before the patent application is authorized, so the patent infringement in the United States depends on the patent application date, and the infringement is judged after the application date.