Filing a provisional patent lets inventors secure an early filing date without needing detailed claims or oaths. Filed application for patent filed in the United States may claim the benefit of, or priority to, a prior application filed in the United States.A priority date patent establishes the priority date as the earliest date an application may claim precedence. Yes, you can claim priority to any provisional that was filed within one year of the filing date of the nonprovisional application. The 12month window for filing a PCT application commences on the filing date of the earliest application in the family. The priority date determines whether another patent filing or publicly available document qualifies as prior art against one's patent application. The priority date, on the other hand, is the date when the novelty of your invention was established. The priority date is the date you filed the first application. Patent filings based on US provisional patent applications. Now, the applicant who first files their patent application receives priority.