Patent 8664239
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: Veloxis Pharmaceuticals AS
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
As of May 31, 2026, there are no AIA trial proceedings (Inter Partes Review, Post-Grant Review, or Covered Business Method) on file for US Patent 8,664,239. This indicates that the patent has not been subjected to challenges at the Patent Trial and Appeal Board (PTAB) through these specific mechanisms.
Strategic summary
Currently, all claims of US 8,664,239 remain unchallenged and, therefore, are neither canceled nor sustained by PTAB proceedings. Since no AIA trials have been initiated, there is no estoppel landscape established under 35 U.S.C. § 315(e)(2) for any potential petitioner or their privies. All prior-art grounds remain available for future challenges, whether in litigation or a new PTAB petition. The absence of PTAB activity suggests that the patent has not yet faced validity challenges in this forum, or that previous challenges, if any, were resolved prior to an AIA trial filing, or that potential challengers have not found suitable grounds or motivation to file.
Recommended next steps
Since there is no PTAB activity on file for US 8,664,239, a defendant currently facing assertion of this patent should consider the following:
- Evaluate potential IPR/PGR challenges: Assess the patent's claims against prior art to determine if strong grounds for an Inter Partes Review (IPR) or Post-Grant Review (PGR) exist. While no challenges have been filed to date, this does not preclude the existence of invalidating prior art.
- Monitor for future filings: Keep an eye on the USPTO's PTAB E2E system for any newly filed petitions against US 8,664,239. The absence of past filings does not guarantee future inaction.
Generated 5/31/2026, 6:49:18 PM