PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US patent 12401721, which is currently pending institution. This means the patent's claims have not yet been substantively challenged or canceled through PTAB proceedings, leaving all claims untested by an AIA trial.

IPR2026-00276 — Amazon.com Services LLC et al. v. May Patents Ltd

• Type: Inter Partes Review
• Filed: 2026-02-28
• Status: Pending – The proceeding is active and awaiting an institution decision from the PTAB.
• Judge panel: Information regarding the specific Administrative Patent Judges assigned to the panel for this proceeding is not yet publicly available in the provided data or standard search results for a pending, non-instituted IPR.
• Petition grounds: Details regarding the specific claims challenged, the prior art asserted, and the statutory bases (§ 102 / § 103) are typically contained within the petition itself. This information is not publicly available from the current search results as the petition has not been instituted and a full public record may not be readily indexed.
• Institution decision: As of the current date (2026-05-29), an institution decision has not yet been issued. The statutory deadline for the PTAB to decide whether to institute an IPR is typically one year from the date the petition is filed, with a preliminary response from the patent owner due three months after filing. Therefore, an institution decision would likely be due around 2027-02-28.
• Final Written Decision: Not applicable, as the proceeding has not yet reached institution.
• Settlement / termination: No settlement or termination has been recorded as the proceeding is still in its early stages.
• Appeal: Not applicable.
• Defensive value: This proceeding is in its early stages and has not yet resulted in any claim invalidation or hardening of the patent. For a defendant, this IPR represents an ongoing challenge to the patent, but its ultimate impact on claim validity is yet to be determined.

Strategic summary

Patent US12401721 currently faces one active Inter Partes Review, IPR2026-00276, initiated by Amazon.com Services LLC et al. The proceeding is in the pre-institution phase, meaning no claims have been canceled or sustained by the PTAB. All claims of the patent are currently untested by a final written decision from the PTAB. The institution decision is anticipated around February 2027.

The estoppel landscape is not yet set, as no institution decision has been rendered. If the PTAB institutes the IPR, the petitioner, Amazon.com Services LLC et al., will be estopped from raising grounds that were raised or reasonably could have been raised in the IPR if a final written decision is issued. For other potential defendants, all prior-art grounds remain available for future challenges, either at the PTAB or in district court. The involvement of Amazon.com Services LLC et al. as a petitioner suggests that the patent may be asserted or perceived as a threat in the e-commerce or cloud services space.

Recommended next steps

• Monitor IPR2026-00276 closely. The next significant milestone will be the institution decision, expected around 2027-02-28. The institution decision will reveal which claims, if any, the PTAB believes are likely unpatentable and will proceed to trial.
• Obtain and review the IPR2026-00276 petition and the Patent Owner's preliminary response (if available) to understand the specific prior art and arguments being presented against the patent's claims. This will provide insight into the potential weaknesses of the patent.
• Given the patent's active status and the pendency of an IPR, consider the patent's claims carefully in any defensive strategy. The outcome of this IPR will significantly inform future actions.## Proceedings overview
  There is one AIA trial proceeding on file for US patent 12401721, which is currently pending institution. This means the patent's claims have not yet been substantively challenged or canceled through PTAB proceedings, leaving all claims untested by an AIA trial.

IPR2026-00276 — Amazon.com Services LLC et al. v. May Patents Ltd

• Type: Inter Partes Review
• Filed: 2026-02-28
• Status: Pending – The proceeding is active and awaiting an institution decision from the PTAB.
• Judge panel: Information regarding the specific Administrative Patent Judges assigned to the panel for this proceeding is not yet publicly available in the provided data or standard search results for a pending, non-instituted IPR. PTAB institution decisions are now made by the USPTO Director, in consultation with at least three PTAB judges, and a summary notice is issued either granting or denying institution.
• Petition grounds: Details regarding the specific claims challenged, the prior art asserted, and the statutory bases (§ 102 / § 103) are typically contained within the petition itself. This information is not publicly available from the current search results as the petition has not been instituted and a full public record may not be readily indexed. IPR petitions generally challenge claims on the basis of prior art consisting of patents or printed publications under §§ 102 or 103.
• Institution decision: As of the current date (2026-05-29), an institution decision has not yet been issued. The statutory deadline for the PTAB to decide whether to institute an IPR is typically one year from the date the petition is filed, with a preliminary response from the patent owner due three months after filing. Therefore, an institution decision would likely be due around 2027-02-28.
• Final Written Decision: Not applicable, as the proceeding has not yet reached institution.
• Settlement / termination: No settlement or termination has been recorded as the proceeding is still in its early stages.
• Appeal: Not applicable.
• Defensive value: This proceeding is in its early stages and has not yet resulted in any claim invalidation or hardening of the patent. For a defendant, this IPR represents an ongoing challenge to the patent, but its ultimate impact on claim validity is yet to be determined.

Strategic summary

Patent US12401721 currently faces one active Inter Partes Review, IPR2026-00276, initiated by Amazon.com Services LLC et al. The proceeding is in the pre-institution phase, meaning no claims have been canceled or sustained by the PTAB. All claims of the patent are currently untested by a final written decision from the PTAB. The institution decision is anticipated around February 2027.

The estoppel landscape is not yet set, as no institution decision has been rendered. If the PTAB institutes the IPR and issues a final written decision, the petitioner, Amazon.com Services LLC et al., will be estopped from raising grounds that were raised or reasonably could have been raised in the IPR. For other potential defendants, all prior-art grounds remain available for future challenges, either at the PTAB or in district court. The involvement of Amazon.com Services LLC et al. as a petitioner suggests that the patent may be asserted or perceived as a threat in areas relevant to computer networks, multiplex communication, video distribution, and security, which is the technical center (2400) where the patent falls. Recent changes in PTAB procedure, effective since late 2025, centralize IPR institution authority with the USPTO Director, which could impact the likelihood of institution for any petition.

Recommended next steps

• Monitor IPR2026-00276 closely. The next significant milestone will be the institution decision, expected around 2027-02-28. The institution decision will reveal which claims, if any, the PTAB believes are likely unpatentable and will proceed to trial.
• Obtain and review the IPR2026-00276 petition and the Patent Owner's preliminary response (if available) to understand the specific prior art and arguments being presented against the patent's claims. This will provide insight into the potential weaknesses of the patent.
• Given the patent's active status and the pendency of an IPR, consider the patent's claims carefully in any defensive strategy. The outcome of this IPR will significantly inform future actions.