IPLA – International Patent Legal Administration
OPET – Office of Petitions
Generally available
| Petition type | Average days pending of decided petitions | Median 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)) | 72 | 50 | 48% | IPLA | |
| 293 - Unintentional delay claiming benefit/priority add'l info | 64 | 38 | 47% | ||
| 507 - Late filing of priority papers (37 CFR 1.55(f)) | 89 | 81.5 | 52% | OPET | |
| 535 - To accept unintentionally delayed priority/continuity claims (37 CFR 1.78 and 37 CFR 1.55) | 68 | 68 | 55% | OPET | |
| 565 - To accept unintentionally delayed priority/continuity claims add'l info | 47 | 36 | 42% | OPET | |
540 - restoration (37 CFR 1.78 and 37 CFR 1.55)
| 76 | 80.5 | 78% | OPET |
*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 October 3, 2025, and is updated quarterly.