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. You can file a provisional patent application with a description and drawings to secure a priority date.What is a patent priority date? Priority date refers to the earliest filing date in a family of patent applications. This article aims to assess the roles of priority dates in the registration and enforcement of trademark and patent rights. You can claim a priority filing date if you file your international application within six months of filing your basic trademark application. A trademark priority date is the earliest a trademark can be registered with the US Trademark Office (USPTO). Scribed in a publication in the United States or in a foreign country, before the filing date or priority date of the application for patent,. Examination of patent, design, and trademark applications. The effective filing date of the patent application exclusive of priority under the initial publications.