Patent 6807524
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 is no PTAB activity on file for US patent 6807524. Therefore, the patent remains unadjudicated by AIA trial proceedings at the USPTO. This gives a defendant no immediate defensive leverage from canceled claims at the PTAB.
Strategic summary
As of the current date, US patent 6807524 has no recorded AIA trial proceedings (Inter Partes Review, Post-Grant Review, or Covered Business Method review) at the Patent Trial and Appeal Board (PTAB). This means that all claims of the patent (claims 1-49) are currently untested in these specific types of USPTO trials. No claims have been canceled or sustained through PTAB decisions.
The absence of PTAB activity suggests that potential prior-art grounds against this patent have not yet been formally litigated before the Board. Consequently, the estoppel provisions of 35 U.S.C. § 315(e)(2), which bar petitioners and their privies from raising grounds they raised or reasonably could have raised, do not apply here. For a defendant facing assertion of this patent, all prior-art grounds remain available for potential IPR or other challenges, assuming they meet the statutory requirements for filing a petition.
Recommended next steps
Since there is no PTAB activity on file for US6807524, the recommended next steps would be:
- Conduct a thorough prior art search: Given the patent's expiration in 2019-10-27 (according to Google Patents), any potential invalidity arguments would focus on prior art predating its priority date of 1998-10-27.
- Evaluate grounds for an IPR petition: If facing litigation or a demand letter, a defendant could consider filing an IPR petition if new and relevant prior art is identified that was not considered during original prosecution. However, given the patent is expired, the primary utility of an IPR (or other AIA trial) is to address ongoing damages or enforceability if the patent is still being asserted for past infringement.
- Monitor for future PTAB filings: While no current proceedings exist, it's prudent to regularly check the USPTO's Patent Trial and Appeal Board Decisions and the PTAB Open Data Portal for any newly filed petitions against US6807524, as this status can change.
Generated 5/29/2026, 6:00:45 PM