Public PAIR IFW (CMS*) Archive

The USPTO continually seeks to improve its access to our data by providing this new and automated access to some of our most high value data assets, PUBLIC PAIR IFW Images and meta data.

The PAIRIndex.txt CSV file is compressed into PAIRIndex.zip and is posted no later than 10:00AM ET daily. The file contains a row for each application that is on the system. Each row contains the following fields:

  • Application Serial Number
  • Date scraped from Public PAIR
  • File size of the application ZIP archive

On June 25, our offering for the Public PAIR IFW Archive will consist of the following:

  • All applications filed between April 30, 2020 to June 19, 2020
  • A partial set of applications prior to April 30, 2020 (approximately four million individual applications)
  • Weekly updates of current applications will be posted each Monday by 10:00 a.m. EST

On or about July 15, 2020, we will offer a full set loaded and referenced in PAIRIndex.txt

Please modify your download process to verify that the application you want is in the PAIR index, and that it’s posting date is later than the last time you downloaded it, before downloading. This will minimize the number of unnecessary file requests on the servers and provide better download service to everyone.

A complete list of all the PAIR zipped archives on this site, along with each archive's posting date and size in bytes, is available here:

File Name File Size (bytes) Posting Date
PAIRIndex.zip

How to access the data

To access a particular archive, replace "Application_Number_Format" in the following URL with an application number of interest:

https://imagefilewrapper.uspto.gov/ifw_images_01/{Characters_0_thru_1_of_Application_Number/{Characters_2_thru_4_of_Application_Number}/{Characters_5_thru_end_of_Application_Number}/{Application_Number_Format}.zip

An example of Application_Number_Format using Application ID 61200037: https://imagefilewrapper.uspto.gov/ifw_images_01/61/200/037/61200037.zip (APP_NUM is an eight-digit number. The first two digits are the series code)


No guarantees are made with respect to the completeness or accuracy of this data. Please visit the USPTO PAIR site for official, current, and complete information.

If you have questions, please send them via email to IPD@USPTO.GOV

* The acronym Image File Wrapper (IFW) will begin to transition to Content Management System (CMS).