PTAB challenges

PTAB proceedings on file

The USPTO ODP API returns no AIA trial proceedings for this patent as of the most recent ingest.

Proceedings overview

There are no AIA trial proceedings (Inter Partes Review, Post-Grant Review, or Covered Business Method review) currently on file or recorded for U.S. Patent 12,236,456. This indicates that the patent has not been challenged through these specific administrative proceedings at the Patent Trial and Appeal Board (PTAB). For a defendant, this means the patent has not been subjected to PTAB scrutiny, and all claims remain untested by these particular challenges.

Strategic summary

As of the current date, no claims of U.S. Patent 12,236,456 have been canceled, sustained, or even tested through PTAB proceedings. All claims of the patent are therefore considered UNTESTED in the context of AIA trials.

Since no PTAB proceedings have been initiated or concluded, there is no estoppel landscape established under 35 U.S.C. § 315(e)(2). This means that a potential defendant is not barred from raising any ground of invalidity (e.g., anticipation under § 102 or obviousness under § 103) that they raised or reasonably could have raised in a hypothetical IPR. The full range of prior art and invalidity arguments remain available for any potential challenge in district court or a future PTAB filing.

The absence of PTAB activity is notable, especially given the patent's involvement in district court litigation. Well-asserted patents often become targets for IPRs or other AIA trials as defendants seek to invalidate claims more quickly and cost-effectively than in district court. This lack of PTAB challenges could suggest a strategic decision by prior defendants, a perceived difficulty in finding compelling prior art, or simply that the litigation has not yet advanced to a stage where such challenges are typically launched.

Recommended next steps

Since no PTAB activity exists for U.S. Patent 12,236,456, a defendant facing assertion of this patent should consider the following:

• Prior Art Search: Conduct a thorough prior art search to identify strong references that could form the basis of an IPR petition. The absence of previous IPRs means there's no established estoppel for prior art grounds, leaving the field open.
• Validity Analysis: Perform a detailed validity analysis of all asserted claims against any newly discovered prior art and the references already cited during prosecution (e.g., US 2002/0087326 A1, US 2005/0144068 A1, US 7,069,219 B2). This would include assessing the strength of anticipation (§ 102) and obviousness (§ 103) arguments.
• IPR Feasibility Study: If strong prior art is found, initiate an IPR feasibility study to determine the likelihood of institution and eventual invalidation of the asserted claims. The priority date of February 6, 2007, makes the patent eligible for IPR.
• Monitoring: Continuously monitor the patent for any newly filed PTAB proceedings, as well as the ongoing district court litigation (e.g., VB Assets, LLC v. Google LLC et al., 1:2026cv00443 in Delaware, and 2:25-cv-00621 in Texas Eastern District Court). Outcomes in related cases or subsequent PTAB filings could significantly impact the defensive posture.