How long can an interim extension last?
According to MPEP 2755.01, interim extensions can be granted for periods of up to one year each. The MPEP states:
“The length of any interim extension is discretionary with the Director so long as it is for one year or less. Its length should be set to provide time for completion of any outstanding requirements.“
Multiple interim extensions may be granted if necessary, but the total extension period cannot exceed the maximum period of extension for which the patent would be eligible under the final determination.
To learn more:
Topics:
Adjustments,
And Extensions,
MPEP 2700 - Patent Terms,
MPEP 2755.01 - Interim Extension Of Patent Term During The Processing Of The Application,
Patent Law,
Patent Procedure