Patent 6980537
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.
Current assignee: Stingray IP Solutions LLC
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 6980537 as of the most recent ingest from the USPTO ODP API. Web search also did not reveal any Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) proceedings for this patent. This means the patent has not been subjected to AIA trial scrutiny.
Strategic summary
Currently, all claims of US6980537 remain UNTESTED by AIA trial proceedings at the PTAB. Since no IPRs, PGRs, or CBMs have been filed, there are no claims that have been canceled or sustained by a Final Written Decision from the PTAB. This also means there is no estoppel landscape established under 35 U.S.C. § 315(e)(2) for any petitioner or their privies, as no petition has been instituted. The absence of PTAB challenges for a patent that was granted in 2005 (and subsequently expired in 2023) could indicate a variety of factors, such as the patent not being widely asserted or the asserted claims not being considered vulnerable by potential petitioners, or simply that any challenges occurred through district court litigation rather than PTAB. The litigation history visible on Google Patents indicates multiple district court cases, suggesting assertion of the patent.
Recommended next steps
Since no PTAB activity exists for US6980537, a defendant facing assertion of this patent would have all prior-art grounds available to them for a potential IPR petition, assuming they meet the statutory requirements for filing (e.g., timeliness, standing). The absence of PTAB activity suggests that the patent claims have not been subjected to the rigorous review often seen in IPRs. Given the patent's expiration date of 2023-06-16, any new PTAB petitions would be out of time for IPRs (which must be filed within one year of service of a complaint alleging infringement) or PGRs (which must be filed within nine months of grant or reissue). However, a defendant can still consider a validity challenge in district court.
Generated 5/29/2026, 6:45:31 PM