Application Assistance Unit

Toll-Free: 888-786-0101
Local: 571-272-4000

The staff in the Application Assistance Unit (AAU) is trained to assist with a broad range of questions and issues pertaining to pre-examination processing of patent applications by the Office of Patent Application Processing (OPAP) and the post-examination processing of patent applications by the Office of Data Management (ODM).  

Contact us if you have questions regarding the America Invents Act, including legal provisions and rules in effect as of September 16, 2012 or issues as they pertain to the pre-examination and the post-examination processing of patent applications.  

Provide feedback on your AAU experience

If you have already contacted the AAU, we want to hear from you. Were you satisfied by the assistance provided by our staff? Please let us know what we can do to improve.

Submit feedback


We can assist with questions about:

  • Status of an application that is in the pre-examination or the post-examination phase of processing
  • Filing receipts
  • Missing parts letters
  • Pre-examination and the post-examination abandonment notices
  • Express abandonments
  • Change/withdrawal of attorney; change of address
  • Power of attorney
  • Inventor Oath and Declaration

We can also assist with:

  • Listing a patent for sale in official gazette
  • Lost or damaged patent grants or soft copies
  • Processing of Certificates of Corrections 


Assistance is available Monday through Friday (except federal holidays) from 8:30 a.m. to 5 p.m. ET.

The AAU will operate on the following 2017 holiday schedule:

January 2, 2017*

Monday, New Year’s Day


January 16, 2017

Monday, Birthday of Martin Luther King. Jr.


January 20, 2017**

Friday, Inauguration Day


February 20, 2017

Monday, George Washington Birthday


May 29, 2017

Monday, Memorial Day


July 4, 2017

Monday, Independence Day


September 4, 2017

Monday, Labor Day


October 9, 2017

Monday, Columbus Day


November 10, 2017***

Friday, Veterans Day


November 23, 2017

Thursday, Thanksgiving Day


December 25, 2017

Monday, Christmas Day


* January 1, 2017, falls on a Sunday. For most Federal employees, Monday, January 2, will be treated as a holiday.

** Inauguration Day, January 20, 2017, falls on a Friday. An employee who works in the District of Columbia, Montgomery or Prince George's Counties in Maryland, Arlington or Fairfax Counties in Virginia, or the cities of Alexandria or Fairfax in Virginia is entitled to a holiday.

*** November 11, 2017 (the legal public holiday for Veterans Day), falls on a Saturday. For most Federal employees, Friday, November 10, will be treated as a holiday.