How is the 30-month period for national stage entry calculated?

The 30-month period for national stage entry is calculated from the priority date of the international application. The priority date is typically the filing date of the earliest application whose priority is claimed in the international application.

MPEP 601.04 states: “For most applications, the 30-month time period for entry into the national stage expires on the same day of the month as the date of the priority claim in the 30th subsequent month.” However, it’s important to note that if the 30-month period expires on a Saturday, Sunday, or federal holiday, the period is extended to the next succeeding business day.

To learn more:

• national stage entry
• time calculation
• priority date
• PCT application