PTAB challenges

Proceedings overview

There are no AIA trial proceedings (Inter Partes Review, Post-Grant Review, or Covered Business Method review) on file for US Patent 11608915 in the USPTO Open Data Portal as of the most recent ingest. Furthermore, web searches for PTAB activity related to US11608915 did not identify any such proceedings, indicating that the patent's claims remain untested by an AIA trial. This means that a defendant facing assertion of this patent would have all prior-art grounds available for an IPR or PGR challenge.

Strategic summary

Currently, all claims of US11608915 are UNTESTED in AIA trial proceedings. This patent has not been subjected to IPR, PGR, or CBM review, meaning its claims have not been challenged or narrowed by the Patent Trial and Appeal Board.

Since no PTAB proceedings have been initiated or concluded for US11608915, there is no estoppel landscape established under § 315(e)(2). This implies that a potential petitioner (or their privies) is not barred from raising any prior-art grounds they raised or reasonably could have raised, as no such grounds have been litigated at the PTAB for this specific patent. All statutory bases for challenging patentability (§ 102 for anticipation, § 103 for obviousness, § 112 for indefiniteness/written description/enablement if applicable in a PGR) remain available if a defendant chooses to pursue a PTAB challenge.

There are no patterns signaling aggressive PTAB appeals by the patent owner or involvement of defensive aggregators like Unified Patents concerning US11608915, as there are no PTAB proceedings to observe such patterns. While the patent family has been involved in significant district court litigation, particularly concerning inventorship (e.g., Blue Gentian, LLC v. Tristar Products, Inc., where inventorship correction was ordered for related patents), these proceedings did not constitute AIA trial challenges to the patentability of US11608915's claims at the PTAB.

Recommended next steps

If you are a defendant facing assertion of US11608915, the primary implication of no PTAB activity is that the patent's claims have not been formally validated or invalidated by the PTAB.

• Consider a PTAB Challenge: The absence of prior PTAB challenges means a defendant has a full range of prior art and statutory grounds available to consider an IPR or PGR petition against US11608915. This can be a strategic tool to challenge the validity of the patent claims independently of district court litigation.
• Prior Art Search: Conduct a thorough prior art search to identify strong references that could form the basis of an IPR or PGR petition. The detailed description of prior art in the patent itself (e.g., U.S. Pat. No. 3,481,368; U.S. Pat. No. 4,091,063; U.S. Pat. No. 6,948,527) can be a starting point, but a comprehensive search would likely identify additional relevant references.
• Timing: Be mindful of the statutory deadlines for filing IPR (9 months after issuance or service of complaint, whichever is later) or PGR (9 months after issuance). Since this patent issued on March 21, 2023, a PGR window would have closed, leaving IPR as the primary AIA trial option, assuming no earlier service of a complaint.