PTAB challenges

Proceedings overview

Only one AIA trial proceeding has been filed against US patent 9403550: IPR2025-01106. This proceeding received a discretionary denial of institution, meaning no claims were formally invalidated or sustained by the PTAB. For a defendant, this indicates the patent has survived an IPR challenge at the institution stage, suggesting a hardened posture against this specific petitioner.

IPR2025-01106 — Monahan Products, LLC (dba UPPAbaby) et al. v. Baby Jogger, LLC

• Type: Inter Partes Review
• Filed: 2025-06-20
• Status: Discretionary Denial. The Patent Trial and Appeal Board (PTAB) declined to institute the Inter Partes Review, terminating the proceeding before a full trial on the merits.
• Judge panel: The specific judge panel for the discretionary denial was not explicitly identified in the available public information. Such denials are often made by the USPTO Director or an acting Director, especially during periods of workload management policy shifts.
• Petition grounds: The petition challenged claims of US9403550 on grounds of obviousness and/or anticipation under 35 U.S.C. §§ 102 and 103, relying on prior art patents or printed publications. The specific claims challenged and the precise prior art references asserted were not detailed in the available snippets regarding the denial.
• Institution decision: Denied. The institution was denied on a procedural, discretionary basis, rather than on the technical merits of unpatentability. Petitioner Monahan Products, LLC (dba UPPAbaby) et al. filed a stipulation, consistent with the Sotera decision, agreeing not to pursue the same or reasonably could-have-raised invalidity grounds in parallel district court litigations if the IPR were instituted. This suggests the denial likely involved the PTAB's discretionary factors, such as those articulated in Fintiv, which consider parallel district court litigation.
• Final Written Decision: Not issued, as institution of the IPR was denied.
• Settlement / termination: The proceeding was terminated due to the discretionary denial of institution, not a settlement between the parties.
• Appeal: The institution decision was not appealed. Decisions denying institution are generally not appealable.
• Defensive value: This proceeding demonstrates that US9403550 survived a challenge at the PTAB's institution stage. While the claims were not adjudicated on the merits, the patent owner successfully defended against this IPR petition. Monahan Products, LLC (dba UPPAbaby) and Baby Generation, Inc. (dba Mockingbird), and their privies, are now estopped under 35 U.S.C. § 315(e)(1) from asserting in other venues the specific invalidity grounds raised in the petition or any invalidity ground that could have been reasonably raised based on prior art patents or printed publications.

Strategic summary

Currently, all claims of US patent 9403550 remain UNTESTED by a Final Written Decision from the PTAB, as the single IPR filed against it (IPR2025-01106) was denied institution on discretionary grounds. This means there has been no formal PTAB adjudication on the patentability of any claims.

The estoppel landscape is critical. Monahan Products, LLC (dba UPPAbaby) and Baby Generation, Inc. (dba Mockingbird), along with any parties in privity with them, are estopped under 35 U.S.C. § 315(e)(1) from challenging claims of US9403550 in other proceedings (e.g., district court litigation) on any ground that was raised or reasonably could have been raised in IPR2025-01106. This estoppel applies specifically to grounds based on prior art patents or printed publications under 35 U.S.C. §§ 102 or 103. For other potential defendants, these prior art grounds are theoretically still available for challenge, subject to any other relevant procedural bars or discretionary considerations by the PTAB.

Regarding pattern signals, the IPR was filed by parties involved in parallel district court litigation with the patent owner. The discretionary denial aligns with a broader trend by the USPTO Director to manage workload and often deny institution, particularly where parallel litigation is advanced, sometimes without detailed reasoning on the merits. The petitioner's use of a Sotera stipulation (agreeing not to pursue the grounds in parallel litigation if the IPR instituted) indicates an awareness of these discretionary policies.

Recommended next steps

• Review the institution denial decision for IPR2025-01106: A defendant currently facing assertion of US9403550 should obtain and thoroughly review the specific order denying institution in IPR2025-01106 to understand the precise reasoning for the discretionary denial. This will inform whether the same or similar grounds would likely face the same fate if re-asserted by a new petitioner, or if different strategies could be more effective.
• Evaluate unasserted prior art: Given that the IPR was denied institution, the claims of US9403550 have not been substantively tested for patentability at the PTAB. New prior art, or different arguments based on previously considered art, could potentially form the basis of a new IPR petition, provided any Fintiv considerations related to parallel litigation can be overcome.
• Monitor related litigation: The IPR was filed in the context of ongoing district court litigations (e.g., Baby Jogger, LLC v. Baby Generation, Inc., d/b/a Mockingbird, No. 1:24-cv-00725-GBW (D. Del.) and Baby Jogger v. Monahan Products, LLC, d/b/a UPPAbaby, No. 1:24-cv-11582-ADB (D. Mass.)). Any developments in these cases, such as claim construction rulings, summary judgment decisions, or trial outcomes, could significantly impact the perceived strength and value of US9403550.