PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US patent 11451883. This proceeding, IPR2026-00140, is currently pending. As no claims have been invalidated or sustained, the patent's defensive posture remains untested by an AIA trial decision.

IPR2026-00140 — DraftKings Inc. et al. v. Winview IP Holdings LLC

• Type: Inter Partes Review
• Filed: 2026-01-16
• Status: Pending – The proceeding is ongoing and has not yet reached a final decision.
• Judge panel: Information not publicly available at this stage.
• Petition grounds: Information regarding specific claims, prior art, and statutory bases (§ 102 / § 103 / § 112) for the petition is not yet publicly available through general search results at this pending stage.
• Institution decision: Not yet issued. The statutory deadline for an institution decision is typically six months from the filing date of the petition (around July 16, 2026).
• Final Written Decision: Not issued.
• Settlement / termination: Not settled or terminated.
• Appeal: No appeal has been filed as no Final Written Decision has been issued.
• Defensive value: This IPR is in its early stages. Until an institution decision is rendered, and potentially a Final Written Decision, it does not currently impact the patent's validity. If the IPR is instituted, it indicates the PTAB found a reasonable likelihood that at least one challenged claim is unpatentable, which could pose a risk to the patent owner.

Strategic summary

Currently, all claims of US patent 11451883 remain untested by a Final Written Decision from an AIA trial. The single pending IPR, IPR2026-00140, was filed by DraftKings Inc. et al. on January 16, 2026. As of today, May 28, 2026, the Board has not yet issued a decision on institution. Therefore, no claims have been canceled or sustained, and the specific claims challenged and the prior art asserted are not yet widely public or confirmed by an institution decision.

The estoppel landscape is not yet established for US11451883, as there has been no Final Written Decision. Should IPR2026-00140 proceed to a Final Written Decision, the petitioner (DraftKings Inc. et al.) and its privies would be estopped from raising grounds they raised or reasonably could have raised in a future proceeding, per 35 U.S.C. § 315(e)(2). Currently, all prior-art grounds are technically still available to other potential challengers. The filing by DraftKings Inc. et al. suggests that at least one entity is actively challenging the patent. Unified Patents is listed as a source of PTAB data, indicating their potential involvement in monitoring or providing information related to this case, but not necessarily as a petitioner.

Recommended next steps

• Monitor the USPTO PTAB E2E system for IPR2026-00140. The critical next milestone will be the institution decision, which is expected by approximately July 16, 2026. This decision will reveal which claims, if any, the PTAB believes warrant a full review.
• If you are a defendant, understanding the specific claims and prior art challenged in IPR2026-00140 once the institution decision is public will be crucial for assessing the patent's strength and potential impact on any ongoing or future assertions.
• Given that an IPR has been filed, it signals that this patent is likely being asserted or is considered a threat, leading to defensive action by DraftKings Inc. et al. This suggests that the patent is not merely dormant.