How can an applicant correct or add a priority claim in an international application?

An applicant can correct or add a priority claim in an international application according to PCT Rule 26bis.1. This is referenced in 37 CFR 1.451(d), which states:

The applicant may correct or add a priority claim in accordance with PCT Rule 26bis.1.

PCT Rule 26bis.1 allows for the correction or addition of a priority claim within 16 months from the priority date or, where the correction or addition would cause a change in the priority date, within 16 months from the priority date as so changed, whichever 16-month period expires first. However, this must be done no later than four months from the international filing date.

To learn more:

• priority claim
• international application
• PCT
• correction