PTAB challenges

Proceedings Overview

As of May 28, 2026, there is one Post-Grant Review (PGR) proceeding on file for U.S. Patent No. 12347711, with a status of "Pending." This means the patent is currently undergoing review at the Patent Trial and Appeal Board (PTAB), and no final decision on the patentability of its claims has been issued. For a defendant, this indicates that the patent's claims are actively being challenged, and the outcome of this proceeding will significantly impact the patent's defensive posture.

PGR2026-00037 — Entegris, Inc. v. Gudeng Precision Industrial Co Ltd

• Type: Post-Grant Review
• Filed: 2026-03-31
• Status: Pending. The proceeding is in its initial stages, and the PTAB has not yet decided whether to institute a review of the patent's claims.
• Judge panel: Not yet publicly available.
• Petition grounds: Details regarding which claims are challenged, the prior art cited, and the statutory bases (§ 102 for novelty, § 103 for obviousness, or § 112 for written description/enablement) are not yet publicly available through general search.
• Institution decision: Not yet issued. The PTAB typically issues an institution decision within approximately six months of the petition's filing date.
• Final Written Decision: Not applicable; a Final Written Decision has not been issued for this pending proceeding.
• Settlement / termination: Not applicable; the proceeding is pending.
• Appeal: Not applicable; no Final Written Decision has been issued.
• Defensive value: This active PGR indicates that the patent's claims are currently under scrutiny for patentability. Until an institution decision or Final Written Decision is issued, the patent's validity remains uncertain in the face of this challenge.

Strategic Summary

Currently, all claims of U.S. Patent No. 12347711 are UNTESTED by a Final Written Decision from the PTAB, as the single Post-Grant Review, PGR2026-00037, is in a "Pending" status. This means there are no invalidated claims to leverage defensively, nor are there any claims confirmed as patentable by the PTAB. The estoppel landscape is not yet established for this patent.

The petitioner, Entegris, Inc., has a history of patent disputes with Gudeng Precision Industrial Co., Ltd. in Taiwan, concerning different patents related to semiconductor wafer and reticle carriers. While these past cases do not directly relate to US patent 12347711, the filing of a PGR by Entegris suggests a continued competitive and legal engagement between the two entities in the U.S. patent landscape. The outcome of PGR2026-00037 will be crucial in defining the strength and scope of patent 12347711.

Recommended Next Steps

• Monitor the active proceeding: Keep a close watch on PGR2026-00037 for key milestones. The institution decision is the next critical event, typically due around six months from the filing date (approximately late September 2026). If instituted, the Final Written Decision would typically be due one year from the institution date.
• Access public docket for PGR2026-00037: To understand the specific claims challenged and prior art grounds, regularly check the USPTO's Patent Trial and Appeal Case Tracking System (P-TACTS), which has replaced the PTAB E2E system for AIA trials, for PGR2026-00037. This will provide access to the petition, patent owner preliminary response, and other filings as they become available.