Can the USPTO request additional information for a priority restoration petition?

Yes, the USPTO may request additional information when considering a petition to restore the right of priority. The MPEP states:

The Director may require additional information where there is a question whether the delay was unintentional.

This means that if the USPTO has doubts about whether the delay in filing was truly unintentional, they may ask for more details or evidence to support your claim. It’s important to be prepared to provide such information if requested to ensure your petition is properly considered.

For more information on unintentional delay, visit: unintentional delay.