No “Second Bite”: USPTO Denies IPR After Trial Loss

Why It Matters

The ruling limits strategic abuse of IPRs after litigation losses, protecting patent owners and preserving the efficiency goals of the AIA.

Key Takeaways

• USPTO denied IPR, citing AIA's intent as litigation alternative.
• Director emphasized petitioner’s own error excluded expert testimony.
• Decision curbs repeat challenges after district‑court loss.
• Over 80% of PTAB cases run parallel to litigation.
• Patent owners can use trial outcomes to block subsequent IPRs.

Pulse Analysis

The America Invents Act created inter partes review (IPR) as a fast, cost‑effective substitute for traditional patent litigation. By shifting validity disputes to the Patent Trial and Appeal Board, Congress aimed to reduce courtroom congestion and lower expenses for challengers. However, the system also opened a pathway for parties to pursue parallel challenges, using IPRs as a tactical lever after an unfavorable court ruling. The USPTO’s recent Director Discretionary Decision signals a recalibration, reminding stakeholders that the administrative route is meant to complement, not duplicate, district‑court proceedings.

In Magnolia Medical Technologies v. Kurin, the petitioner filed an IPR after a jury found the patent valid, arguing that the court never decided the anticipation and obviousness grounds because its expert was excluded. The USPTO Director, John Squires, rejected that argument, noting the exclusion resulted from the petitioner’s failure to disclose the expert’s claim‑construction analysis on time—a procedural misstep wholly within its control. He stressed that a lack of a verdict on specific validity theories does not create a “second bite” at the PTAB, and that the agency must protect patent owners from repetitive administrative attacks.

The decision underscores a growing USPTO focus on discretionary denials when IPRs overlap with ongoing litigation. With more than 80 percent of PTAB filings tied to parallel court cases, the agency is signaling that procedural defaults—such as untimely expert disclosures—can be decisive in denying institution. For patent owners, the ruling provides a strategic tool: a successful court defense can now be leveraged to block subsequent administrative challenges, preserving portfolio value and deterring harassing repeat petitions. Conversely, challengers must tighten pre‑filing compliance and consider the risk that the PTAB may view post‑trial IPRs as an abuse of the AIA’s intended efficiency.