PKI authentication for EFS-Web and Private PAIR will be unavailable on May 22, starting at 12:01 AM and ending at 11:59 PM (ET). Additional outages will be scheduled. Authentication via verified accounts will continue to be available. Please see the USPTO Systems Status and Availability page for more information.


EFS-Web, Private PAIR, and Public PAIR will be unavailable beginning at 11:59 p.m., Friday, May 24th, and ending at 5:00 p.m., Monday, May 27th ET. Please visit USPTO Systems Status and Availability for more information. If you have questions, please contact the EBC at (866) 217-9197 or

Check the filing status of your patent application


Private PAIR

Securely access information on your pending patent application

(New Method)

Check the status of a pending application: sign-in

Learn more about the new authentication method to sign in to EFS-Web and Private PAIR.

(Old Method)

Check the status of a pending application 

Public PAIR

For documents and status on publicly available patents and applications

Check the status of a published application

Migration Tool

Allows existing PKI digital certificate holders (Registered Practitioners and Pro Se Inventors) to verify their account using their PKI digital certificate. Once account verification is complete, the account can be used to sign-in to EFS-Web and Private PAIR.

For step-by-step process, see Migration Guide.

Sponsorship Tool

The Sponsorship Tool is now available for registered practitioners to sponsor their support staff to work on their behalf. In order to sponsor support staff, a practitioner must first migrate to a account and the support staff must each have a account.

For step-by-step instructions, see Sponsorship Tool Guide

Sponsor Support Staff


The Patent Application Information Retrieval (PAIR) system provides USPTO customers a safe, simple, and secure way to retrieve and download information regarding patent application status. There are two PAIR applications, Public PAIR and Private PAIR. Public PAIR provides access to issued patents and published applications. Private PAIR provides secure real-time access to pending application status and history using digital certificates.

In order to access Private PAIR, you must:

  • be a registered patent attorney/agent, an independent inventor, or a person granted limited recognition,

  • have a customer number,

  • have a digital PKI certificate to secure the transmission of the application to the USPTO

To register for Private PAIR visit our Customer Number and Patent Electronic Verification Form page

Public PAIR- Search issued patents and published applications

Private PAIR- Securely search pending applications

e-Office Action- Learn how to receive e-notification of USPTO communications

PAIR Resources- Visit our resource page for help on getting started with PAIR

Announcements and Notices

PAIR Announcements- For recent news related to both Public and Private PAIR