Patent 8311040
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
No AIA trial proceedings (Inter Partes Review, Post-Grant Review, or Covered Business Method) have been found on file for US patent 8311040 based on the most recent ingest from the USPTO Open Data Portal and supplementary web searches. This defensive posture means the patent's claims remain untested by these specific administrative validity challenges.
Strategic summary
All claims of US8311040 remain untested by AIA trial proceedings. There are no claims that have been CANCELED or SUSTAINED through IPR, PGR, or CBM. The estoppel landscape under § 315(e)(2) is therefore currently clear regarding PTAB-raised prior art grounds, as no such grounds have been litigated. There is no pattern of PTAB challenges for this patent by any specific petitioner or patent owner appeals.
Recommended next steps
As of today, 2026-05-29, no PTAB activity (IPR, PGR, or CBM) has been identified for US patent 8311040 through the USPTO Open Data Portal or web searches. This absence of PTAB challenges is a notable signal, especially for a patent that has been involved in significant district court litigation as indicated on its Google Patents page. If facing assertion of this patent, potential defendants would have the full range of prior-art grounds available for an IPR petition under §§ 102 or 103, as there are no estoppel bars from prior PTAB proceedings.
Generated 5/29/2026, 8:54:22 PM