Foreign priority or domestic benefit related petitions

IPLA – International Patent Legal Administration
OPET – Office of Petitions

Generally available

Petition typeAverage days pending of decided petitionsMedian days pending of decided petitionsGrant rate percentageDeciding officeePetition option
283 - Unintentional delay priority claim (37 CFR 1.78(a)(3) & (a)(6) and 37 CFR 1.55 (c))9185.557%IPLA 
507 - Late filing of priority papers (37 CFR 1.55(f))16519675%OPET 
535 - To accept unintentionally delayed priority/continuity claims (37 CFR 1.78 and 37 CFR 1.55)735547%OPET 

540 - restoration (37 CFR 1.78 and 37  CFR 1.55)



*Infrequently filed petition

Displayed are the 12-month rolling average and median values. When the median value is significantly different from the average value, the median value will better represent when a particular category of a petition has been decided. This is because a small number of outliers can disproportionately impact the average value. The values exclude ePetitions.

The data is current as of January 3, 2023, and is updated quarterly.