Foreign Priority or Domestic Benefit Related Petitions

IPLA – International Patent Legal Administration
OPET – Office of Petitions

Generally Available

Petition Type

Avg. Days Pending of Decided Petitions

Grant Rate Percentage

Deciding Office

ePetition Option

283 - Unintentional Delay Priority Claim (37 CFR 1.78(a)(3) & (a)(6) and 37 CFR 1.55 (c ))8848%IPLA 
507 - Late Filing of Priority Papers (37 CFR 1.55(f))15875%OPET 
535 - To Accept Unintentionally Delayed Priority/Continuity Claims Restoration, (37 CFR 1.78 and 37 CFR 1.55)12454%OPET 

*Infrequently Filed Petition

This is a 12 Month Rolling Average.  

The data is current as of  April 1, 2021  and is updated quarterly.