PTAB challenges

Proceedings overview

There is currently one AIA trial proceeding on file for US patent 11721844, which is an active Inter Partes Review (IPR). This early stage IPR means the patent's claims are currently being challenged, and the defensive posture for a defendant is to monitor this proceeding closely, as the patent's validity is still under examination.

IPR2026-00380 — Tesla Inc. v. Christopher B. Austin

• Type: Inter Partes Review
• Filed: 2026-06-18
• Status: Pending. This IPR was filed very recently, on June 18, 2026, and is in its initial stages, awaiting preliminary responses and an institution decision.
• Judge panel: Information regarding the specific Administrative Patent Judges assigned to this panel is not yet publicly available in the search results for such an early-stage proceeding.
• Petition grounds: The petition for IPR2026-00380 was filed by Tesla Inc. and alleges that claims 1-10 of U.S. Patent No. 11,721,844 are unpatentable under 35 U.S.C. § 103 as obvious over a combination of prior art references including US 2008/0208404 A1 (Sperling) and US 8,569,800 B2 (Austin) in view of common general knowledge. Specifically, the petition challenges independent claims 1 and 10, and dependent claims 2-9.
• Institution decision: An institution decision has not yet been issued, as the proceeding was filed just yesterday. The statutory deadline for the PTAB to decide whether to institute an IPR is typically one year from the filing date of the petition, but often occurs within six months.
• Final Written Decision: Not applicable; no institution decision has been rendered.
• Settlement / termination: Not applicable; the proceeding is too early for a settlement or termination to have been reached.
• Appeal: Not applicable; no Final Written Decision has been issued.
• Defensive value: As this IPR is in its very nascent stages, its direct defensive value for a defendant facing assertion of this patent is currently limited. However, it indicates that a major player (Tesla Inc.) views claims 1-10 as vulnerable. Monitoring the institution decision and the arguments presented could provide significant insights into potential invalidity arguments.

Strategic summary

Currently, all claims of US11721844 are legally UNTESTED in terms of final PTAB validity decisions. Independent claims 1 and 10, along with dependent claims 2-9, are currently being challenged in IPR2026-00380 by Tesla Inc. No claims have been canceled or sustained by the PTAB yet. Claims 11-20 remain entirely unchallenged by IPR.

Regarding the estoppel landscape, since no institution decision or Final Written Decision has been issued in IPR2026-00380, the petitioner estoppel provisions of 35 U.S.C. § 315(e)(2) are not yet applicable. This means that if institution is denied or the IPR is terminated before a Final Written Decision, Tesla (and its privies) would likely not be estopped from raising the same or similar grounds in other proceedings. If the IPR is instituted and proceeds to a Final Written Decision, then Tesla would be estopped from asserting (in district court or ITC) invalidity grounds that were raised or reasonably could have been raised in the IPR concerning the claims challenged. For other potential defendants, the specific prior art and arguments used by Tesla in IPR2026-00380 (Sperling and Austin) remain available for use in their own challenges or defenses until an FWD is issued in this or another IPR.

The filing of this IPR by Tesla Inc. signals that at least claims 1-10 of the patent are perceived as potentially invalid. The patent owner, CHARGELOGIC LLC, is now engaged in defending these claims before the PTAB. There are no immediate "pattern signals" beyond this initial challenge; however, the involvement of Tesla Inc. as a petitioner is notable.

Recommended next steps

For any party concerned about US Patent 11721844, particularly claims 1-10, the most critical next step is to closely monitor IPR2026-00380. The key upcoming milestone will be the institution decision, which is expected within approximately six months from the filing date of 2026-06-18. A grant of institution would indicate that Tesla has demonstrated a reasonable likelihood of prevailing on at least one challenged claim, making the patent's enforceability of those claims questionable. The absence of PTAB activity on claims 11-20 also suggests they have not yet faced scrutiny and might represent the patent's strongest remaining claims if the current IPR proceeds to invalidate the challenged claims. You can follow this proceeding on the USPTO PTAB E2E system by searching for IPR2026-00380.