What happens if I miss the maintenance fee payment and grace period?
If you miss both the maintenance fee payment and the 6-month grace period, your patent will expire. However, the USPTO may accept late payments under certain conditions. According to MPEP 2501:
“The Director may accept the payment of any maintenance fee required by subsection (b) after the 6-month grace period if the delay is shown to the satisfaction of the Director to have been unintentional.”
To reinstate the patent, you must file a petition showing the delay was unintentional and pay the maintenance fee along with any required surcharges. If accepted, “the patent shall be considered as not having expired at the end of the grace period.”
To learn more:
Topics:
MPEP 2500 - Maintenance Fees,
MPEP 2501 - Introduction,
Patent Law,
Patent Procedure