Maintenance fees are generally not refundable, with limited exceptions. According to MPEP 2515, which cites 37 CFR 1.366(g): “Maintenance fees and surcharges relating thereto will not be refunded except in accordance with §§ 1.26 and 1.28(a).“ This means that refunds are only possible in specific circumstances, such as when fees were paid by mistake or…

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