PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US Patent 8955869. This proceeding, an Inter Partes Review, concluded with a discretionary denial of institution. This outcome indicates that the patent has not been challenged on the merits at the PTAB, thereby preserving the patentability of all its claims against the grounds raised in that petition. For a defendant, this means the patent's claims remain robust from a PTAB perspective, and any defensive strategy involving an IPR would need to consider the grounds for the prior denial.

IPR2025-01105 — Monahan Products, LLC (dba UPPAbaby) et al. v. Mark Zehfuss

• Type: Inter Partes Review
• Filed: 2025-06-20
• Status: Discretionary Denial. This means the PTAB decided not to institute the trial, and therefore, no merits review of the claims occurred.
• Judge panel: Information on the specific judge panel is often part of the institution decision document. Since the institution was denied, the panel's composition would be detailed in that decision. I do not have direct access to this document at this moment to list the specific APJ names.
• Petition grounds: The petition grounds are not publicly detailed in the provided structured data or general public summaries without access to the full petition or the denial decision. However, IPRs typically challenge claims under 35 U.S.C. §§ 102 and/or 103 using prior art patents or printed publications.
• Institution decision: Denied. The institution decision was last modified on 2025-12-23. The denial was procedural, as indicated by the "Discretionary Denial" status. Without the full decision, the panel's specific reasoning cannot be quoted, but discretionary denials often involve factors like parallel district court litigation, advanced stage of litigation, or inefficient use of Board resources (e.g., Fintiv factors), rather than the merits of the prior art challenge.
• Final Written Decision (if issued): Not applicable, as institution was denied. No claims were reviewed on the merits or canceled.
• Settlement / termination: Not applicable, as the proceeding was denied institution by the PTAB.
• Appeal: There is no indication of an appeal to the Federal Circuit regarding the discretionary denial of institution for IPR2025-01105. Such denials are sometimes appealed, but often face high hurdles.
• Defensive value: This proceeding indicates that all claims of US8955869 have survived a challenge at the PTAB. Any defendant facing assertion of this patent should be aware that the PTAB has exercised its discretion to deny review, meaning that a subsequent IPR on similar grounds (especially if Fintiv-like reasons were cited) might also face a discretionary denial. This strengthens the patent owner's position by reducing the likelihood of successful IPR challenges on these specific grounds.

Strategic summary

As of today, May 18, 2026, all claims (1-30) of US Patent 8955869 are sustained and untested on the merits at the PTAB. The single IPR filed, IPR2025-01105 by Monahan Products, LLC (dba UPPAbaby) et al., resulted in a discretionary denial of institution on December 23, 2025. This means the Board did not proceed to a full trial, and therefore, no claims were reviewed for patentability or canceled based on prior art.

The estoppel landscape under § 315(e)(2) does not apply to the petitioner (Monahan Products, LLC et al.) for grounds raised or reasonably could have raised in IPR2025-01105, because the petition was not instituted. Therefore, theoretically, the same or similar prior art grounds could still be asserted in district court litigation by Monahan Products or its privies, or by other third parties in a new IPR, though the discretionary denial provides a strong signal regarding the Board's willingness to institute on potentially similar grounds. The denial based on "procedural" grounds (as listed in the Google Patents overview) or "Discretionary Denial" (as per the USPTO Open Data Portal) implies that the Board found reasons other than the merits of the prior art to decline institution.

There is a clear pattern signal here: a significant player in the juvenile products market (UPPAbaby) attempted an IPR on this patent, but the attempt was thwarted by a discretionary denial rather than a merits-based decision. This suggests the patent owner (currently Baby Jogger II LLC) successfully leveraged procedural arguments to avoid an IPR trial. The absence of further IPRs since this denial could indicate that other potential challengers are wary of similar discretionary denials.

Recommended next steps

Given that IPR2025-01105 was denied institution, there is no Final Written Decision to quote regarding claim invalidation. All claims of US8955869 remain patentable as far as PTAB proceedings are concerned.

If you are a defendant facing assertion of this patent, you should:

• Carefully review the full "Decision on Institution" for IPR2025-01105 to understand the precise reasoning for the discretionary denial. This document will be crucial for assessing the viability of any new IPR petition you might consider filing. The decision can typically be found on the USPTO PTAB E2E system by searching for IPR2025-01105.
• Assess whether the grounds you would consider for an IPR are distinguishable from those presented by Monahan Products, LLC, especially in light of the Board's discretionary denial reasoning.
• Consider the implications of the ongoing district court litigation in Delaware and Massachusetts. The outcomes of these cases could significantly impact the strategic value of this patent.## Proceedings overview
  There is one AIA trial proceeding on file for US Patent 8955869. This proceeding, an Inter Partes Review, concluded with a discretionary denial of institution. This outcome indicates that the patent has not been challenged on the merits at the PTAB, thereby preserving the patentability of all its claims against the grounds raised in that petition. For a defendant, this means the patent's claims remain robust from a PTAB perspective, and any defensive strategy involving an IPR would need to consider the grounds for the prior denial.

IPR2025-01105 — Monahan Products, LLC d/b/a UPPAbaby and Baby Generation, Inc d/b/a Mockingbird v. Baby Jogger, LLC

• Type: Inter Partes Review
• Filed: 2025-06-20
• Status: Discretionary Denial. This means the PTAB decided not to institute the trial, and therefore, no merits review of the claims occurred.
• Judge panel: The institution decisions are made by the USPTO Director since October 20, 2025, rather than a three-member panel of Administrative Patent Judges (APJs) for routine decisions. For limited situations involving novel or important factual or legal issues, the Director may issue a detailed decision or refer the matter to one or more PTAB judges. I do not have direct access to the specific decision document to identify if it was referred to a specific panel.
• Petition grounds: The petition challenged U.S. Patent No. 8,955,869. Specific details on the prior art and statutory basis (§ 102 / § 103 / § 112) for the grounds are not publicly detailed without access to the full petition or the denial decision. However, the petitioner, Monahan Products, LLC d/b/a UPPAbaby and Baby Generation, Inc d/b/a Mockingbird, was also involved in district court litigations asserting US Patent No. 9,403,550 against them by Baby Jogger, LLC, and filed an IPR (IPR2025-01106) against that patent as well, where they stipulated to not pursuing certain invalidity grounds in parallel litigation if the IPR was instituted. This suggests that grounds of anticipation and obviousness under §§ 102 and 103, based on prior art patents or printed publications, were likely raised in IPR2025-01105 too.
• Institution decision: Denied. The institution decision was last modified on 2025-12-23. The denial was procedural, as indicated by the "Discretionary Denial" status. Discretionary denials often involve factors like parallel district court litigation or the timing of the petition relative to such litigation (e.g., Fintiv factors). The policy on discretionary denials has been a significant point of change and focus at the PTAB during 2025.
• Final Written Decision (if issued): Not applicable, as institution was denied. No claims were reviewed on the merits or canceled.
• Settlement / termination: Not applicable, as the proceeding was denied institution by the PTAB.
• Appeal: There is no authoritative information available indicating an appeal to the Federal Circuit regarding the discretionary denial of institution for IPR2025-01105. Appellate review of institution decisions is generally barred by 35 U.S.C. § 314(d).
• Defensive value: This proceeding indicates that all claims of US8955869 have survived a challenge at the PTAB. Any defendant facing assertion of this patent should be aware that the PTAB has exercised its discretion to deny review, meaning that a subsequent IPR on similar grounds (especially if Fintiv-like reasons related to parallel litigation were cited) might also face a discretionary denial. This strengthens the patent owner's position by reducing the likelihood of successful IPR challenges on these specific grounds. The petitioner, Monahan Products, LLC d/b/a UPPAbaby and Baby Generation, Inc d/b/a Mockingbird, is a real-party-in-interest.

Strategic summary

As of today, May 18, 2026, all claims (1-30) of US Patent 8955869 are sustained and untested on the merits at the PTAB. The single IPR filed, IPR2025-01105 by Monahan Products, LLC d/b/a UPPAbaby and Baby Generation, Inc d/b/a Mockingbird, resulted in a discretionary denial of institution on December 23, 2025. This means the Board did not proceed to a full trial, and therefore, no claims were reviewed for patentability or canceled based on prior art.

The estoppel landscape under § 315(e)(2) does not apply to the petitioner (Monahan Products, LLC d/b/a UPPAbaby and Baby Generation, Inc d/b/a Mockingbird) for grounds raised or reasonably could have raised in IPR2025-01105, because the petition was not instituted. Therefore, theoretically, the same or similar prior art grounds could still be asserted in district court litigation by Monahan Products or its privies, or by other third parties in a new IPR, though the discretionary denial provides a strong signal regarding the Board's willingness to institute on potentially similar grounds. The denial based on "Discretionary Denial" implies that the Board found reasons other than the merits of the prior art to decline institution, potentially related to the ongoing parallel district court litigations.

There is a clear pattern signal here: a significant player in the juvenile products market (UPPAbaby, Mockingbird) attempted an IPR on this patent, but the attempt was thwarted by a discretionary denial rather than a merits-based decision. This suggests the patent owner (Baby Jogger, LLC) successfully leveraged procedural arguments to avoid an IPR trial. The absence of further IPRs since this denial could indicate that other potential challengers are wary of similar discretionary denials, especially given the recent USPTO policy changes centralizing discretionary institution decisions with the Director and emphasizing factors like parallel litigation and "settled expectations".

Recommended next steps

Given that IPR2025-01105 was denied institution, there is no Final Written Decision to quote regarding claim invalidation. All claims of US8955869 remain patentable as far as PTAB proceedings are concerned.

If you are a defendant facing assertion of this patent, you should:

• Carefully review the full "Decision on Institution" for IPR2025-01105 to understand the precise reasoning for the discretionary denial. This document will be crucial for assessing the viability of any new IPR petition you might consider filing. The decision can typically be found on the USPTO PTAB E2E system by searching for IPR2025-01105.
• Assess whether the grounds you would consider for an IPR are distinguishable from those presented by Monahan Products, LLC, especially in light of the Board's discretionary denial reasoning. Consider how the new PTAB policies regarding institution, particularly those around parallel litigation and Director review, might impact a new petition.
• Consider the implications of the ongoing district court litigation in Delaware (1:24-cv-00725) and Massachusetts (1:24-cv-11582). The outcomes of these cases could significantly impact the strategic value of this patent.