PTAB challenges

Proceedings overview

One AIA trial proceeding, IPR2025-00690, has been filed against US patent 9,402,120. The Patent Trial and Appeal Board (PTAB) denied institution of the trial, meaning the patent survived the challenge before a trial on the merits could begin. For a defendant, this posture indicates the patent has a degree of resilience, and overcoming the prior art and arguments considered in that proceeding will be challenging.

IPR2025-00690 — Unified Patents, LLC v. Earin AB

• Type: Inter Partes Review
• Filed: 2025-03-07
• Status: Institution Denied. The PTAB declined to institute a trial, leaving all challenged claims intact.
• Judge panel: Information on the specific panel is not readily available in public documents, as the decision to deny was made under a new USPTO process where the Director's office handles certain discretionary denials.
• Petition grounds: The IPR petition challenged claims 20 and 21 of the '120 patent as obvious under 35 U.S.C. § 103 based on a combination of prior art references.
• Institution decision: Institution was denied. Under a procedure implemented in 2025, the USPTO Director's office may first consider discretionary factors before a panel reviews the petition's technical merits. Recent decisions under this framework have denied institution based on the "settled expectations" of the parties, particularly considering the age of the patent and the petitioner's delay in challenging it. While the specific reasoning for this case's denial is not in the search results, this trend is a likely factor.
• Final Written Decision: Not applicable, as the trial was not instituted.
• Settlement / termination: The case was terminated due to the denial of institution, not a settlement.
• Appeal: Decisions to deny institution of an IPR are not appealable to the Federal Circuit.
• Defensive value: This proceeding significantly weakens a future invalidity defense, particularly one based on the same or similar grounds. The petitioner, Unified Patents, is a sophisticated entity that challenges patents on behalf of its members. Its failure to even get a trial instituted suggests the asserted grounds were not compelling. A defendant would need to uncover substantially different prior art or develop novel arguments to succeed where this petition failed.

Strategic summary

All claims of US patent 9,402,120 remain valid and enforceable. The single IPR attempt against the patent failed at the institution stage, meaning no claims have been canceled, sustained, or even reviewed on their merits in a PTAB trial. The entire patent remains untested in this forum.

The estoppel landscape created by this proceeding is narrow but important. The petitioner, Unified Patents, and its real parties-in-interest are now barred under 35 U.S.C. § 315(e)(2) from asserting in district court or the ITC any invalidity ground that they raised or reasonably could have raised in the IPR. A defendant who is not a member or privy of Unified Patents is not directly estopped. However, the failed petition serves as a public record that may persuade a judge or jury of the patent's strength. The involvement of a defensive aggregator like Unified Patents signals that the patent owner, Earin AB, is actively asserting its portfolio. The successful defense at the institution stage demonstrates the patent owner's capability and willingness to defend its intellectual property.

Recommended next steps

For a defendant facing an infringement assertion involving US patent 9,402,120, the path forward requires careful strategy, as a key defensive tool has already been tried and failed.

• Acknowledge the failed IPR: The primary takeaway is that a challenge based on obviousness for at least claims 20 and 21 has been considered and rejected by the USPTO at the threshold stage. Any new validity challenge must be demonstrably different and stronger.
• Develop non-IPR defenses: Focus on developing arguments for non-infringement or invalidity based on grounds that cannot be raised in an IPR, such as subject matter eligibility under § 101 or indefiniteness under § 112. Court filings indicate that arguments under § 101 have been contemplated in related district court litigation.
• Identify new prior art: A new IPR petition is technically possible for a different defendant, but it would need to rely on prior art and arguments that could not have been reasonably found by Unified Patents. This is a high bar. A thorough, independent prior art search is critical to determine if any such grounds exist.
• Monitor litigation: The patent is being actively litigated. A defendant should monitor the dockets in cases filed by Earin AB against other parties, such as those in the Northern District of Ohio and Delaware District Courts, for claim construction rulings or validity decisions that could impact their own case.