In the past few months, the U.S. Patent and Trademark Office (“PTO”) Acting Director has made substantial changes to the process for, and factors considered in, exercising discretion to deny institution of an inter partes review (“IPR”) petition. We have discussed these changes and recent decisions in prior blogs. Now, the PTO is facing legal challenges stemming from these policy changes. In one pertinent example, SAP America, Inc. filed a Petition for Writ of Mandamus to the Federal Circuit resulting from the PTO’s discretionary denial of its IPR petition, challenging the PTO Acting Director’s authority to enforce these new policies.

On October 1, 2024, SAP America filed an IPR petition seeking to invalidate a patent that was asserted against it in a pending district court litigation. In its IPR petition, SAP America argued that the PTO should not exercise its discretion to deny institution based on the factors and guidance within the former PTO Director’s June 2022 memorandum. The current Acting Director’s decision to rescind this guidance memorandum was issued on February 28, 2025. The PTO denied institution of SAP America’s IPR petition under its discretion on April 7, 2025. In its decision, the PTO found that SAP America’s Sotera stipulation had “limited practical effect”—a factor which, under the previous guidance, would have been accorded significant weight against exercising discretion to deny institution.

On April 17, 2025, SAP America asked the Federal Circuit to review the PTO’s revocation of the prior Director’s guidance on discretionary denials. Since SAP America’s initial filing, the PTO has provided additional guidance regarding discretionary denials, including the relevant factors that will be considered and implementing a new, bifurcated process governing how institution decisions are made. SAP America argued that the PTO’s actions violated due process—by retroactively revoking “binding agency guidance”—and further violated the separation of powers by “effectively rewrit[ing]” the IPR statute. SAP America asked the Federal Circuit to make applicable the June 2022 memorandum to all IPR petitions that were filed prior to the current Acting Director’s February 2025 decision to rescind that guidance.

On July 18, 2025, the PTO Acting Director submitted her response. First, the Acting Director contended SAP America’s writ petition was procedurally improper. She argued SAP America’s claims should have been addressed at the PTO and were “capable of remedy through the administrative process.” Summarily, because SAP America failed to raise these complaints before the PTO, the Federal Circuit should decline the opportunity to review them now. Additionally, the Acting Director argued SAP America’s claims were barred under 35 U.S.C. § 314(d) which precludes judicial review of PTO institution decisions.

In her response, the Acting Director also engaged with the merits of SAP America’s arguments concerning the constitutionality of her actions regarding discretionary denials. She emphasized her Congressionally-approved “wide latitude to manage AIA proceedings.” And she further explained that she “faces a significantly different situation than existed in 2022.” Highlighting the backlog of PTAB cases, fewer available judges, and hiring freeze as factors that underlie the necessity of her issued policy changes regarding discretionary denials, the Acting Director argued her actions were both legally allowable and administratively necessary. 

Whether the Federal Circuit will entertain SAP America’s pleas remains to be seen. While the current PTO guidance is unlikely to change based on the pending writ, the outcome could alter the course of future IPR institution denials. As we have emphasized previously, these PTO policy changes are reshaping both petitioner’s IPR strategies and patentees’ litigation approaches. The Proskauer Team is continuing to monitor the PTO’s evolving guidance on discretionary denials and decisions as well as legal challenges to the PTO’s guidance. We are happy to discuss any questions you may have regarding how these developments may affect your IPR strategy.

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Photo of Erik Milch Erik Milch

Erik Milch is a partner in the Litigation Department and a member of the Intellectual Property, Patent Law and Trials group.

Erik brings more than 20 years of experience litigating in key jurisdictions across the U.S., as well as before the International Trade…

Erik Milch is a partner in the Litigation Department and a member of the Intellectual Property, Patent Law and Trials group.

Erik brings more than 20 years of experience litigating in key jurisdictions across the U.S., as well as before the International Trade Commission and the U.S. Patent and Trademark Office. As a first-chair trial lawyer, Erik litigates complex matters involving medical devices, life sciences instrumentation, pharmaceuticals, electrical and computer technology, and consumer products. He regularly counsels clients in a range of industries in connection with patent procurement, development of patent portfolios, patent licensing, valuation of patent portfolios in business transactions and transactional diligence.

Erik has extensive experience in all aspects of patent litigation from pre-filing through appeal, including enforcement of patents against competitors and defense of patent infringement allegations. His technical background includes microfluidics, lab automation, optical imaging instruments, wound closure, surgical instrumentation, orthopedics, autoinjectors, tissue resection and sealing, pharmaceuticals, haptic feedback systems, computer software, consumer products, fluid mechanics applications, automotive engines and mechanical and electrical components, aerospace propulsion and control systems, weapons systems, and telecommunications.

Erik has been consistently recognized in Chambers USA and IAM Patent 1000 for his significant expertise in patent litigation. He was also recognized as a “Top Lawyer” by The Washingtonian.

Prior to pursuing a legal career, Erik earned a bachelor’s degree in mechanical engineering from Georgia Tech, where he developed a deep appreciation for cutting-edge technology and its potential to drive progress. His background in engineering equips him with a unique ability to comprehend intricate technical concepts. This enables him to effectively navigate the intricate world of patent litigation, combining his legal skills with technical know-how to provide comprehensive and strategic counsel to his clients.

In addition to his academic accomplishments, Erik served as an officer in the United States Navy. His military background instilled in him a strong sense of discipline, leadership, perseverance, and attention to detail; qualities that continue to guide him in his legal practice.

Photo of Elizabeth Shrieves Elizabeth Shrieves

Elizabeth (Beth) Shrieves is an associate in the Litigation Department and a member of the Intellectual Property and Patent Law groups. Beth has experience litigating in numerous federal district courts across the United States, as well as before the Federal Circuit, U.S. Patent…

Elizabeth (Beth) Shrieves is an associate in the Litigation Department and a member of the Intellectual Property and Patent Law groups. Beth has experience litigating in numerous federal district courts across the United States, as well as before the Federal Circuit, U.S. Patent and Trademark Office, and International Trade Commission. Beth’s experience covers a wide variety of products and technology involving software and applications, medical devices and technology, electrical hardware, telecommunications, supercapacitors, automotive engines, weapon systems, and consumer products. She has counseled clients throughout all stages of litigation, including both plaintiff and defense work, from pre-suit investigation, initial pleadings, discovery, trial, and through appeal.

Beth graduated from George Mason University School of Law where she earned her J.D., Magna Cum Laude. Prior to earning her law degree, she received a bachelor’s degree from Wake Forest University where she also graduated Magna Cum Laude. Beth also previously worked as a paralegal where she gained a deeper understanding of the nuances of commercial litigation.