Filing creates rights: In EU, China, Japan, most countries - whoever files first wins, regardless of prior use. No registration = no rights.Trademark Lens checks availability before filing - priority date only matters for names you can actually register. Clear availability first, then file fast.
Priority dates in trademark registration are important, but how do you establish priority? Learn about filing a trademark application and "in commerce" use.

Learn how a trademark priority date secures your brand. Discover why filing first matters and how it impacts your IP protection in Australia and abroad.

1003 Section 44(d) - Priority Filing Date Based on a Foreign Application.The USPTO will deny a filing date to an application under 1 or 44 of the Trademark Act if the application does not identify recognizable goods or services. See TMEP 1402.02 for further information.

This filing is often referred to as an Intent to Use (ITU) application. Under Section 7(c) of the Lanham Act, the filing date of a federal trademark application establishes the owners date of constructive use of the mark.
The priority claim does not have any other effects apart from changing the effective filing date of an application to that of the priority date. The successful registration of the initial application will in no way guarantee the success of the subsequent trademark application.