Can maintenance fees be prorated for patents expiring between due dates?
No, maintenance fees cannot be prorated for patents expiring between due dates. The MPEP 2520 clearly states: “If a patent will expire part way between the due dates set in 35 U.S.C. 41(b), or between the latest due date and the term set in 35 U.S.C. 154, it is still required that the entire maintenance…
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