Expiration of the 12 month priority period falls on a Saturday for a PCT Application

When filing a PCT application for a Pittsburgh Company the 12 month priority period fell on August 15, 2009 which is a Saturday.  The PCT application had already been filed on August 14, 2009 but the inventor wanted to add some additional information and contacted us at 6:00 PM on August 15, 2009.  The additional matter would have required re-filing the application.  The inventor wanted to sleep on the decisions of re-filing to include the additional information.

This raised the issue of whether or not the priority period expired on August 15, 2009 or was extended to August 17, 2009 because August 15, 2009 was a Saturday.  PCT Rules 2.4 and 80.5 govern this situation and state as follows:

Rule 2.4 – “Priority Period”

(a) Whenever the term “priority period” is used in relation to a priority claim, it shall be construed as meaning the period of 12 months from the filing date of the earlier application whose priority is so claimed. The day of filing of the earlier application shall not be included in that period; and

(b) Rule 80.5 shall apply mutatis mutandis to the priority period; and

Rule 80.5 – “Expiration on a Non-Working Day or Official Holiday”

If the expiration of any period during which any document or fee must reach a national   Office or intergovernmental organization falls on a day:

  (i)  on which such Office or organization is not open to the public for the purposes of the transaction of official business;

the period shall expire on the next subsequent day on which none of the said four circumstances exists.

The U.S. Patent Office’s normal operation of business days are Monday through Friday. 


– John Thomas

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s