Patent 9253428
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
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Proceedings on file (0)
All PTAB activity →AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.
No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Proceedings overview
The USPTO Open Data Portal API indicates no AIA trial proceedings on file for US Patent 9253428 as of the most recent ingest. A comprehensive web search for Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) proceedings related to this patent also yielded no results. Therefore, for a defendant facing assertion of this patent, the patent has not undergone any challenges in AIA trial proceedings, meaning all claims remain untested by the PTAB.
Strategic summary
As of 2026-07-06, all claims of US Patent 9253428 remain SUSTAINED and UNTESTED by any AIA trial proceeding before the PTAB. There are no canceled claims, and no prior art grounds have been adjudicated or barred by PTAB estoppel under § 315(e)(2). This means a defendant currently facing assertion of this patent would have all available prior art grounds open for potential PTAB challenge.
There is no identifiable pattern of PTAB challenges for this patent, as no proceedings have been filed. The absence of PTAB activity could suggest various things, such as the patent not having been widely asserted, or prior challenges being resolved through other means, but without formal PTAB records, these are speculative.
Recommended next steps
Since no PTAB activity exists for US Patent 9253428, any defendant facing an assertion of this patent would have a clear field to initiate an AIA trial proceeding if they believe valid prior art grounds exist. The absence of previous challenges means there is no existing PTAB record to navigate regarding claim interpretation, validity findings, or estoppel.
Consider conducting a thorough prior art search to identify potential invalidity grounds under 35 U.S.C. §§ 102 and 103, as these grounds remain entirely untested by the PTAB for this patent. If such art is found, filing a petition for Inter Partes Review (IPR) could be a viable defense strategy.
Generated 7/6/2026, 12:01:36 PM