The USPTO has denied an inter partes review (IPR) petition, clarifying that a party cannot use the Patent Trial and Appeal Board (PTAB) as a repeat vehicle to litigate patent validity after its expert testimony was excluded in a failed district court trial. USPTO Under Secretary and Director John A. Squires issued a Director Discretionary Decision in Magnolia Medical Technologies, Inc. v. Kurin, Inc.. The decision exercises the Director’s unreviewable discretion under 35 U.S.C. § 314(a) to deny institution, emphasizing that AIA reviews are intended as an alternative to litigation, not an expansion of it.
Petitioner Magnolia Medical Technologies filed an IPR petition challenging U.S. Patent No. 12,138,052, owned by Kurin, Inc., after the conclusion of a parallel district court patent infringement trial. In the district court proceeding, a jury found the patent “not invalid” on the grounds presented at trial. Of note, the petitioner’s anticipation and obviousness grounds were never presented to the jury because the district court precluded the testimony of the petitioner’s invalidity expert. The preclusion occurred because the expert failed to timely disclose the underlying claim construction for his opinions, a mistake the Director noted was entirely within the petitioner’s control.
Following its trial loss, Magnolia filed its IPR petition asserting anticipation and obviousness grounds substantially similar to the ones excluded in court. Magnolia argued that because its expert was barred, no tribunal had actually adjudicated the § 102 or § 103 validity of the claims, which should favor institution.
The Director’s Public Interest Reasoning
Director Squires rejected the petitioner’s reasoning, emphasizing that a lack of a jury verdict on specific grounds does not entitle a party to re-litigate the same issues before the USPTO. The decision was based on several factors grounding the denial in the broader public interest:
Alignment with Congressional Intent
The America Invents Act (AIA) designed IPRs to be a quick, cost-effective alternative to district court litigation. Allowing a petition after a completed trial forces parties to expend redundant resources, frustrating the purpose of the statute.
No Second Bites
The petitioner had a full and fair opportunity to litigate its invalidity theories in district court but lost its expert due to its own procedural errors. The Director emphasized that the exclusion resulted from the petitioner’s failure to timely disclose its expert’s claim construction, an error entirely within its control. The PTAB will not serve as a safety net to undo a private litigation loss.
Regulatory vs. Adjudicatory Roles
While district courts resolve private disputes, the USPTO’s discretion focuses on systemic administrative efficiency, the integrity of the patent system, and protecting patent owners from harassment or repetitive administrative attacks.
The Director also pointed out that more than 80 percent of PTAB proceedings involve parallel litigation, signaling a problematic shift where parties use IPRs for tactical leverage rather than as true litigation alternatives. The decision is part of a broader effort by the USPTO to curb perceived misuse of AIA proceedings, including parallel litigation tactics and repeat challenges following adverse outcomes.
This decision reinforces the growing importance of discretionary denial and highlights the consideration of parallel litigation strategies. Patent owners defending patents can leverage the progress of parallel litigation and any procedural defaults by the challenger to argue for discretionary denial.
For more information on this topic, please contact Fitch Even partner Steven M. Freeland, author of this alert.
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Steven M. Freeland
Steven M. Freeland practices in all areas of intellectual property law, focusing primarily on the development, protection, and management of intellectual property. Steve assists clients with sophisticated patent portfolio management and the prosecution of complex patents, helping them to manage their patent assets using strategies tailored to further their business objectives.