Patent 6430408
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 U.S. Patent 6430408 according to the USPTO ODP API. A web search conducted on May 29, 2026, also did not surface any records of Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) proceedings for this patent. This gives a defendant a defensive posture where all claims of the patent are currently untested by AIA trial proceedings.
Strategic summary
All 13 claims of U.S. Patent 6430408 remain untested by AIA trial proceedings. There are no canceled or sustained claims through IPR, PGR, or CBM. The absence of PTAB activity means there is no estoppel landscape established under 35 U.S.C. § 315(e)(2) for this patent. Consequently, all prior-art grounds that could be raised in an AIA trial proceeding are still available to a potential petitioner. There is no discernible pattern of PTAB challenges or appeals by the patent owner or defensive aggregators.
Recommended next steps
Since no PTAB activity exists for U.S. Patent 6430408, a defendant facing assertion of this patent today should consider initiating an IPR or PGR (if applicable) to challenge the validity of the claims. The patent expired on May 16, 2020, which means it cannot be asserted for new infringement, but past infringement could still be at issue. However, due to its expired status, new IPR petitions cannot be filed, as IPRs can only be filed against unexpired patents. Therefore, the primary avenue for challenging validity would be in district court litigation or through other mechanisms, rather than new PTAB proceedings.
Generated 5/29/2026, 9:06:55 PM