Is there a limit to the number of interim extensions an applicant can receive?

Yes, there is a general limit to the number of interim extensions an applicant can receive under 35 U.S.C. 156(d)(5). According to MPEP 2754.02: “An applicant is generally limited to four one-year interim extensions.” This limitation means that patent holders typically have up to four years of interim extensions to obtain product approval before they…

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