EFS-Web Contingency

EFS-Web logo

The United States Patent and Trademark Office (USPTO) is increasing the availability of its patent electronic filing system, Electronic Filing System - Web (EFS-Web) by providing a new contingency option when the primary portal for EFS-Web is unavailable. Similar to the EFS-Web Unregistered site, EFS-Web Contingency offers the same user interface and equivalent functionality by permitting users to file new applications, requests for reexamination and certain petitions.

Note: National stage submissions under 35 U.S.C. 371 cannot be filed via EFS-Web Contingency.

To file National stage submissions under 35 U.S.C. 371 or follow-on documents to an existing application,  please use alternative filing method.

Benefits of the EFS-Web Contingency system include:

  • Increased overall system availability for electronic filing, with EFS-Web availability supplemented by EFS-Web Contingency
  • Identical user interface and equivalent functionality as Unregistered EFS-Web
  • Exactly the same back-end processing of submitted applications as Unregistered EFS-Web
  • Users will continue to promptly receive an electronic acknowledgement receipt of their EFS-Web Contingency submission and have the ability to review their applications or documents via the Patent Application Information Retrieval (PAIR) system


Note: Follow-on submissions not permitted in EFS-Web Contingency

Filing follow-on documents and follow-on fee payments to an existing patent application is not permitted via EFS-Web Contingency. When an applicant improperly files a follow-on document as a new application via EFS-Web Contingency (or EFS-Web) and requests the USPTO to move the follow-on document to the appropriate application, a petition under 37 CRF 1.182 accompanied by the petition fee will be required.

Note: Saved Submissions not available in EFS-Web Contingency

Registered e-filers who have uploaded documents to a Saved Submission package in EFS-Web will not be able to retrieve those Saved Submission documents in EFS-Web Contingency.


To file a new patent application using EFS-Web Contingency, click the link below:

>> Launch EFS-Web Contingency

Additional Information:


EFS-Web Contingency Support:

For specific questions about how to use Patent electronic systems to submit or review patent applications and patent documents, please call the Patent Electronic Business Center at 866-217-9197 (toll free) or e-mail EBC@uspto.gov .