How are foreign priority claims verified by patent examiners?

Patent examiners verify foreign priority claims through the following steps:

1. Check that foreign applications listed on the oath, declaration, or application data sheet are properly listed on the bib-data sheet.
2. Verify the accuracy of the application number, country, and filing date for each foreign application.
3. Ensure that only countries qualifying for benefits under 35 U.S.C. 119(a)-(d) are listed.
4. Initial the bib-data sheet in the “VERIFIED” space when the information is correct or has been amended to be correct.
5. Indicate in the Office action and on the bib-data sheet whether the conditions of 35 U.S.C. 119(a)-(d) or (f) have been met.

MPEP 202 states: “The examiner should check this information for accuracy. Should there be an error on the oath or declaration, or application data sheet itself, the examiner should require a new oath or declaration, or application data sheet, where appropriate. A petition for an unintentionally delayed claim for priority may also be required.”