PTAB challenges

Proceedings overview

One AIA trial proceeding has been filed against US patent 11550512. This proceeding, IPR2026-00359, is currently pending, initiated by Advanced Micro Devices, Inc. As it is in its very early stages, no claims have been invalidated or sustained yet, and the patent's defensive posture remains largely unhardened by PTAB scrutiny.

IPR2026-00359 — Advanced Micro Devices, Inc. v. Fermat International Inc.

• Type: Inter Partes Review
• Filed: 2026-05-12
• Status: Pending – This IPR was recently filed and is awaiting a decision on institution.
• Judge panel: Not yet publicly available. The PTAB panel is typically assigned and made public after the petition is filed and initial administrative tasks are completed, but before an institution decision is rendered.
• Petition grounds: Details regarding the specific claims challenged, prior art references, and statutory bases (§ 102 / § 103 / § 112) of the petition are not yet publicly available through general search, as the proceeding is in its initial phase. This information would typically be found in the filed petition document.
• Institution decision: Not yet issued. The deadline for the PTAB to issue a decision on whether to institute trial for IPR2026-00359 is approximately six months from the filing date, around November 12, 2026.
• Final Written Decision: Not issued. A Final Written Decision is issued approximately one year after an IPR is instituted.
• Settlement / termination: No information regarding settlement or termination is available at this early stage.
• Appeal: No appeal has been filed, as no Final Written Decision has been issued.
• Defensive value: This proceeding is in its infancy. A defendant facing assertion of this patent today should be aware that claims may be challenged, but currently, no claims have been impacted by this IPR. The outcome of the institution decision will be the first significant indicator of the patent's vulnerability.

Strategic summary

Currently, the patent US11550512 has all its claims untested by a PTAB Final Written Decision. The sole proceeding, IPR2026-00359, is in the very early "Pending" stage, meaning the PTAB has not yet decided whether to institute a trial. Consequently, there are no claims that are currently CANCELED or SUSTAINED through PTAB review. All claims of the patent remain untested by the PTAB.

The estoppel landscape is minimal at this stage. Section 315(e)(2) estoppel, which bars petitioners and their privies from raising grounds raised or reasonably could have raised, only applies after a Final Written Decision. Since no such decision exists, any prior-art grounds remain broadly available for other potential challengers. There is no discernible pattern yet, as this is the first recorded AIA trial for this patent.

Recommended next steps

• Monitor IPR2026-00359 closely: For a defendant, the most crucial upcoming milestone is the institution decision for IPR2026-00359, expected around November 12, 2026. This decision will indicate whether the PTAB believes there is a reasonable likelihood that at least one claim is unpatentable, thus initiating a full trial.
• Review the IPR petition: Obtain and review the petition filed by Advanced Micro Devices, Inc. for IPR2026-00359. This will provide specific details on the claims challenged, the prior art cited, and the unpatentability arguments, which is critical for understanding the potential scope of claims that might be canceled.
• Assess challenged claims: Understand which claims are challenged in IPR2026-00359 and evaluate the strength of the petitioner's arguments against them, especially if those claims are central to any assertion against your products or services.