PTAB challenges

Proceedings overview

US Patent 12359506 is currently involved in one active Post-Grant Review (PGR) proceeding. The status of this proceeding is "Pending," meaning no claims have been invalidated or sustained, and institution has not yet been decided. Therefore, the patent claims remain fully enforceable, and a defendant facing assertion of this patent would need to prepare for a robust defense given the patent's current active status.

PGR2026-00044 — Tricam Industries, LLC v. Little Giant Ladder Systems, LLC

• Type: Post-Grant Review (PGR)
• Filed: 2026-04-14
• Status: Pending
• Judge panel: Not yet publicly available, as the proceeding is in its early stages.
• Petition grounds: The publicly available PTAB data does not yet specify the exact claims challenged, the prior art cited, or the statutory bases (§ 102 / § 103 / § 112) for the petition. This information typically becomes public with the institution decision or later in the proceedings.
• Institution decision: Not yet issued. The PTAB has a statutory deadline of one year from the petition filing date to issue a final written decision, with an institution decision typically rendered within six months of the petition filing date. As of today's date, May 29, 2026, the petition was filed on April 14, 2026, so the institution decision is still pending.
• Final Written Decision: Not yet issued.
• Settlement / termination: Not yet settled or terminated.
• Appeal: Not applicable, as no Final Written Decision has been issued.
• Defensive value: This active PGR proceeding indicates that the patentability of US 12359506 is currently under review by the PTAB. While the patent remains fully enforceable, the outcome of this PGR could significantly impact the strength of the patent. A defendant should closely monitor this proceeding, as an institution decision against the patent owner or a subsequent Final Written Decision canceling claims would provide strong defensive leverage. Conversely, a denial of institution or a decision sustaining the claims would strengthen the patent owner's position.

Strategic summary

Currently, all claims of US Patent 12359506 are UNTESTED in the context of a PTAB final written decision. One PGR proceeding, PGR2026-00044, is active and pending an institution decision. This means that no claims have been canceled or sustained by the PTAB at this time.

The estoppel landscape has not yet been formed by a Final Written Decision in PGR2026-00044. If the PTAB institutes the PGR and proceeds to a Final Written Decision, the petitioner (Tricam Industries, LLC) and its privies would be estopped from raising any ground they raised or reasonably could have raised in a subsequent civil action or ITC proceeding. For other defendants being asserted against, the prior art grounds remain available, subject to the evolving PTAB discretionary denial factors, particularly those related to domestic manufacturing and small businesses.

The current PTAB activity shows that Tricam Industries, LLC, a competitor and also the petitioner in the pending PGR, is actively challenging this patent. This signals that the patent is considered a potential threat by at least one market participant. The institution rate for IPRs and PGRs has seen a downward trend, with recent statistics indicating a significant percentage of petitions being denied institution, often due to discretionary considerations. This trend, coupled with the USPTO's new emphasis on domestic manufacturing for institution decisions, could influence the outcome of PGR2026-00044.

Recommended next steps

Since PGR2026-00044 is currently pending institution, a defendant should closely track its progress. The key milestone to watch for is the institution decision, which is expected within approximately six months of the petition filing date (April 14, 2026).

It is advisable to monitor the PTAB's Electronic Filing System (EFS-Web) for PGR2026-00044 to access the petition, patent owner's preliminary response, and ultimately the institution decision. The USPTO PTAB Decisions portal can be used to monitor the status of this proceeding.