PTAB challenges

Proceedings overview

The USPTO Open Data Portal (ODP) API indicates no AIA trial proceedings have been filed against US Patent 8,914,526 as of the most recent ingest. A web search for PTAB proceedings related to US8914526 also did not identify any Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) patent challenges.

Strategic summary

As of June 1, 2026, there are no PTAB proceedings on file for US Patent 8,914,526. This means all claims of the patent (claims 1-63) remain untested by AIA trial procedures. Consequently, there are no claims that have been canceled or sustained through IPR, PGR, or CBM. The patent owner, Portus Singapore Pte Ltd, has not faced any challenges to the patentability of these claims before the PTAB.

Since no PTAB proceedings have occurred, there is no estoppel landscape under 35 U.S.C. § 315(e)(2) for this patent. This implies that all prior-art grounds, including those that could have been raised in an IPR, PGR, or CBM, are theoretically still available for a defendant to assert in district court litigation or to initiate a new PTAB proceeding, provided they meet the statutory requirements (e.g., timing, standing). There is no pattern of PTAB challenges or appeals by the patent owner or petitioners, nor any involvement of defensive aggregators.

Recommended next steps

Given the absence of any PTAB activity on US Patent 8,914,526, if you are a defendant facing an assertion of this patent, you should consider the following:

• Absence of PTAB hardening: The patent has not been subjected to PTAB scrutiny, meaning its claims have not been challenged or confirmed by the Board. This could indicate potential vulnerabilities that have not yet been explored in an AIA trial.
• Evaluate for PTAB petitions: A thorough prior art search should be conducted to identify potential grounds for an Inter Partes Review (IPR) or Post-Grant Review (PGR), depending on the specific circumstances and filing date of the patent (priority date is 1998-12-17, filing date is 1999-12-17, so PGR would generally not be applicable unless specific conditions related to post-AIA applications apply, making IPR the primary option for challenging validity based on patents or printed publications).
• Assessment of claim scope: Since the claims are untested, their interpretation might be broad, and careful analysis is required to determine potential invalidity arguments or non-infringement positions.
• No immediate estoppel: The absence of prior PTAB proceedings means there are no estoppel bars for you as a potential petitioner in a new PTAB challenge, provided all statutory requirements are met.