Patent 8279642B2
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
There are no AIA trial proceedings on file for US Patent 8279642B2.
Strategic summary
As of today, May 24, 2026, there is no PTAB activity recorded for US Patent 8279642B2. This means all claims of the patent (1-41) are currently untested by AIA trial proceedings. The absence of PTAB challenges could indicate several things: either the patent has not been extensively asserted in litigation, the asserted claims have not been deemed vulnerable to prior art, or potential petitioners have chosen other avenues to challenge the patent's validity.
The estoppel landscape remains open for this patent. Since no IPRs, PGRs, or CBMs have been filed, no prior art grounds have been adjudicated at the PTAB, and thus, no estoppel would apply to future petitioners under 35 U.S.C. § 315(e)(2). This means that a defendant facing assertion of this patent would have a full range of prior art arguments available for an AIA trial.
There are no discernible pattern signals from PTAB proceedings, such as multiple filings by the same petitioner or aggressive appeal strategies by the patent owner, due to the lack of any proceedings.
Recommended next steps
Since no PTAB activity exists for US Patent 8279642B2, a defendant facing assertion of this patent would have the opportunity to file an AIA trial petition (e.g., IPR) without facing estoppel based on prior PTAB decisions related to this patent. The absence of such proceedings suggests that this patent may not have been heavily litigated or targeted by defensive aggregators in the past.
Generated 5/24/2026, 6:46:19 PM