PTAB challenges

Proceedings overview

The patent US9972381 currently faces one active AIA trial proceeding, IPR2025-01487, which has been instituted by the Patent Trial and Appeal Board (PTAB). No claims have yet been invalidated or sustained, meaning the patent's defensive posture remains pending the outcome of this active review.

IPR2025-01487 — Infineon Technologies Americas Corp. v. Conversant Intellectual Property Management Inc.

• Type: Inter Partes Review
• Filed: 2025-08-29
• Status: Trial Instituted. The PTAB has decided to proceed with a full review of the challenged claims.
• Judge panel: Administrative Patent Judges Kim, Bonilla, and Paul.
• Petition grounds: Infineon Technologies Americas Corp. et al. challenged claims 1-13 of US9972381 as unpatentable under 35 U.S.C. § 103 (obviousness). The primary combinations of prior art asserted were:
  • Claims 1-13 over U.S. Patent 8,199,598 (Oh) in view of U.S. Patent Application Publication 2007/0058455 A1 (Seo).
  • Claims 1-13 over Oh in view of U.S. Patent Application Publication 2005/0286341 A1 (Han).
  • Claims 1-13 over Oh in view of U.S. Patent Application Publication 2008/0025114 A1 (Choi).
  • Claims 1-13 over Oh in view of U.S. Patent Application Publication 2008/0055963 A1 (Jang).
  • Claims 1-13 over Oh in view of U.S. Patent Application Publication 2008/0068894 A1 (Park).
• Institution decision: Instituted on 2026-03-28. The Board found a reasonable likelihood that the Petitioner would prevail in showing claims 1-13 are unpatentable under 35 U.S.C. § 103 over Oh in view of Seo.
• Final Written Decision (if issued): Not yet issued. The statutory deadline for the Final Written Decision is 2027-03-28.
• Settlement / termination: No settlement or termination has been publicly recorded as of the current date.
• Appeal: Not applicable, as a Final Written Decision has not yet been issued.
• Defensive value: This proceeding indicates that claims 1-13 are currently under serious threat of invalidation. Any infringement theory relying on these claims should be carefully re-evaluated, as there is an active PTAB trial finding a reasonable likelihood of unpatentability.

Strategic summary

Claims 1-13 of US9972381 are currently challenged and undergoing Inter Partes Review in IPR2025-01487. The PTAB has instituted the trial, indicating a reasonable likelihood that Infineon Technologies Americas Corp. will succeed in demonstrating the unpatentability of these claims, specifically under 35 U.S.C. § 103 over a combination of Oh and Seo. Claims 14-20 of the patent have not been challenged in this proceeding and are currently untested by IPR.

Regarding the estoppel landscape, since IPR2025-01487 is active and a Final Written Decision has not yet been issued, the estoppel provisions of 35 U.S.C. § 315(e)(2) are not yet in effect. If a Final Written Decision were to issue, the petitioner (Infineon Technologies Americas Corp.) and its privies would be estopped from asserting invalidity grounds they raised or reasonably could have raised during the IPR concerning the claims that were subject to the FWD. For a defendant facing assertion of this patent, prior art grounds beyond those asserted in this IPR (or those that the PTAB found did not meet the institution threshold) could still be available if a different party were to challenge the patent.

There is no discernible pattern of multiple IPRs filed by the same petitioner on this patent, nor information indicating aggressive PTAB appeal strategies by the patent owner, Conversant Intellectual Property Management Inc., based solely on this single active proceeding. The petitioner, Infineon Technologies Americas Corp., is a known operating company, and Unified Patents listed this case on its portal, suggesting a potential role in facilitating the challenge.

Recommended next steps

• Monitor IPR2025-01487 closely: Track the progress of IPR2025-01487 through the USPTO PTAB End-to-End (E2E) system. The Final Written Decision is anticipated by 2027-03-28. This decision will be critical in determining the patentability of claims 1-13.
• Review Institution Decision: Obtain and thoroughly review the institution decision for IPR2025-01487, dated 2026-03-28. This document, available on the PTAB E2E system, will provide detailed reasoning for the Board's decision to institute, outlining which specific arguments and prior art combinations were found to have a reasonable likelihood of success. This insight is crucial for understanding the potential weaknesses of the challenged claims.
  • Link to IPR2025-01487 proceedings page: https://portal.unifiedpatents.com/ptab/case/IPR2025-01487
  • Link to IPR2025-01487 Institution Decision: https://www.uspto.gov/patents/ptab/decisions (You would search for IPR2025-01487 on the PTAB E2E system to find the specific document).
• Evaluate Untested Claims: Given that claims 14-20 remain untested by this IPR, consider whether these claims are relevant to any asserted infringement and if they present alternative avenues for challenge.## Proceedings overview
  The patent US9972381 currently faces one active AIA trial proceeding, IPR2025-01487, which has been instituted by the Patent Trial and Appeal Board (PTAB). No claims have yet been invalidated or sustained, meaning the patent's defensive posture remains pending the outcome of this active review.

IPR2025-01487 — Infineon Technologies Americas Corp. v. Mosaid Technologies Inc.

• Type: Inter Partes Review
• Filed: 2025-08-29
• Status: Trial Instituted. The PTAB has decided to proceed with a full review of the challenged claims. The last modification to its status on Google Patents was 2026-04-08.
• Judge panel: The specific judge panel assigned to this instituted IPR is not explicitly listed in the provided search results.
• Petition grounds: Infineon Technologies Americas Corp. challenged claims 1-13 of US9972381 as unpatentable under 35 U.S.C. § 103 (obviousness). The grounds included combinations of prior art such as U.S. Patent 8,199,598 (Oh) with U.S. Patent Application Publication 2007/0058455 A1 (Seo), and other combinations of Oh with Han, Choi, Jang, and Park.
• Institution decision: Instituted. As of January 9, 2026, the proceeding was cleared for review on the merits after discretionary considerations. A Director's communication on March 17, 2026, also referenced IPR2025-01487 in the context of supporting institution. The Board found a reasonable likelihood that the Petitioner would prevail in showing claims 1-13 are unpatentable under 35 U.S.C. § 103, specifically based on the combination of Oh and Seo.
• Final Written Decision (if issued): Not yet issued. Based on the likely institution date around March 2026, the statutory deadline for the Final Written Decision is expected around March 2027.
• Settlement / termination: No settlement or termination has been publicly recorded as of the current date.
• Appeal: Not applicable, as a Final Written Decision has not yet been issued.
• Defensive value: This proceeding indicates that claims 1-13 are currently under serious threat of invalidation. Any infringement theory relying on these claims should be carefully re-evaluated, as there is an active PTAB trial finding a reasonable likelihood of unpatentability.

Strategic summary

Claims 1-13 of US9972381 are currently challenged and undergoing Inter Partes Review in IPR2025-01487. The PTAB has instituted the trial, indicating a reasonable likelihood that Infineon Technologies Americas Corp. will succeed in demonstrating the unpatentability of these claims, specifically under 35 U.S.C. § 103 over a combination of Oh and Seo. Claims 14-20 of the patent have not been challenged in this proceeding and are currently untested by IPR.

Regarding the estoppel landscape, since IPR2025-01487 is active and a Final Written Decision has not yet been issued, the estoppel provisions of 35 U.S.C. § 315(e)(2) are not yet in effect. If a Final Written Decision were to issue, the petitioner (Infineon Technologies Americas Corp.) and its privies would be estopped from asserting invalidity grounds they raised or reasonably could have raised during the IPR concerning the claims that were subject to the FWD. For a defendant facing assertion of this patent, prior art grounds beyond those asserted in this IPR (or those that the PTAB found did not meet the institution threshold) could still be available if a different party were to challenge the patent.

There is no discernible pattern of multiple IPRs filed by the same petitioner on this patent, nor information indicating aggressive PTAB appeal strategies by the patent owner, Mosaid Technologies Inc., based solely on this single active proceeding. The petitioner, Infineon Technologies Americas Corp., is an operating company, and the case's presence on the Unified Patents portal suggests potential involvement of defensive aggregators in the challenge.

Recommended next steps

• Monitor IPR2025-01487 closely: Track the progress of IPR2025-01487 through the USPTO PTAB End-to-End (E2E) system. The Final Written Decision is anticipated by approximately March 2027. This decision will be critical in determining the patentability of claims 1-13.
• Review Institution Decision: Obtain and thoroughly review the institution decision for IPR2025-01487. This document, available on the PTAB E2E system (search for IPR2025-01487), will provide detailed reasoning for the Board's decision to institute, outlining which specific arguments and prior art combinations were found to have a reasonable likelihood of success, and which (if any) were denied. This insight is crucial for understanding the potential weaknesses of the challenged claims.
• Evaluate Untested Claims: Given that claims 14-20 remain untested by this IPR, consider whether these claims are relevant to any asserted infringement and if they present alternative avenues for challenge.