Correction of inventorship petitions

IPLA – International Patent Legal Administration
OPAP – Office of Patent Application Processing
OPET – Office of Petitions
TC – Technology Center

Generally available

Petition typeAverage days pending of decided petitionsMedian days pending of decided petitionsGrant rate percentageDeciding officeePetition option
311 - For correction of inventorship for applications when filed with another petition handled by OPETNone NoneOPET 
313 - For filing application without one or more inventors176196.536%*OPET 
519 - Rule 1.182 - Inventor name change, order of inventor, atty/assignee name change1109987%OPET 
634 - To correct inventorship in a patent not in interference (37 CFR 1.324, MPEP 1481.02)19 100%*TC 
635 – To change an inventorship in an application (37 CFR 1.48, MPEP 602.01(c)Not available Not availableOPAP 
636 - To change inventorship in a patent (37 CFR 1.324, MPEP 1481.02)None NoneTC 


Prior to examination

Petition typeAverage days pending of decided petitionsMedian days pending of decided petitionsGrant rate percentageDeciding OfficeePetition Option
277 - To decide matters regarding inventorship in national stage - 37 CFR 1.497(d)  15150%*IPLA 
Please scroll to the top of this page to view other petition types that are available during this stage.

*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 4, 2022, and is updated quarterly.