What is an Application Data Sheet (ADS) for patent applications filed before September 16, 2012?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

An Application Data Sheet (ADS) is a voluntary submission for patent applications filed before September 16, 2012, that contains bibliographic data arranged in a specific format. According to MPEP 601.05(b), “An application data sheet is a sheet or sheets, that may be voluntarily submitted in either provisional or nonprovisional applications, which contains bibliographic data, arranged in a format specified by the Office.” The ADS becomes part of the application and must be titled “Application Data Sheet.”