In Excela Pharma Sciences, LLC v. Lee (2015), the Federal Circuit held a third party does not have "the right to challenge, by way of the Administrative Procedure Act (APA), a ruling of the Patent and Trademark Office reviving a patent application that had become abandoned by failure to meet a filing schedule established by the Patent Cooperation Treaty."
The Federal Circuit stated the Patent Act's "intricate scheme for administrative and judicial review of PTO patentability determinations" demonstrates Congress did not intend such challenges. See Pregis Corp. v. Kappos, (Fed. Cir. 2012).
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