Can the time period for filing a foreign priority claim be extended?
No, the time period for filing a foreign priority claim cannot be extended. As stated in MPEP 214.01: “This time period is not extendable.”
However, if you miss the deadline, there is a possibility to file a petition to accept an unintentionally delayed priority claim. The MPEP states: “If a claim for priority under 35 U.S.C. 119(a)-(d) or (f), 365(a) or (b), or 386(a) or (b) is presented after the time period set in 37 CFR 1.55, the claim may be accepted if it includes the required identification information and is accompanied by a grantable petition to accept the unintentionally delayed claim for priority.”
For more information on unintentionally delayed priority claims, refer to MPEP § 214.02.
To learn more:
Topics:
MPEP 200 - Types and Status of Application; Benefit and Priority,
Patent Law,
Patent Procedure