(B) the nonprovisional application claims only priority to, or the benefit of, the filing date of an application filed on or after March 16, 2013. The priority date of a patent relates to the earliest filing date from within a family of patent applications.In the US, an applicant may file a provisional patent application, and then file a fulllength application within one year. This article is first in a twopart series focusing on various issues related to priority claims in U.S. patent applications. Maricopa Community Colleges. Simply enter the date in the format yyyymmdd and click on Search. Eligibility (usually the first day of the month of application) until the date the member is enrolled with the Contractor. A priority claim is made to an earlierfiled patent application. For example, an Applicant can claim priority in a later-filed patent application. Applications received after the review date may not be screened.