PTAB challenges

Proceedings overview

One active Inter Partes Review (IPR) proceeding, IPR2025-01061, has been instituted against US Patent 11763316. This means the patent's validity is currently being challenged before the Patent Trial and Appeal Board (PTAB). For a defendant, this presents an opportunity as the challenged claims are under review and may be invalidated, potentially weakening any assertion strategy.

IPR2025-01061 — TikTok Inc. v. THOMAS L. DISTEFANO III

• Type: Inter Partes Review
• Filed: 2025-05-30
• Status: Trial Instituted — The PTAB has found that there is a reasonable likelihood that at least one challenged claim is unpatentable, and the trial phase is now underway.
• Judge panel: Administrative Patent Judges Jennifer H. Meyer, Rama G. Elluru, John V. Arturi
• Petition grounds: Claims 1-20 of U.S. Patent No. 11,763,316 are challenged as unpatentable under 35 U.S.C. § 103 over a combination of U.S. Patent No. 6,055,562 (HECKEL), U.S. Patent No. 6,195,693 B1 (DIETZ), and a web.archive.org capture of "The Original Stickypad.com" (Stickypad).
• Institution decision: Instituted on 2025-11-20. The panel determined that TikTok Inc. demonstrated a reasonable likelihood that claims 1-20 are unpatentable as obvious over the combination of Heckel, Dietz, and Stickypad.
• Final Written Decision (if issued): Not yet issued. The statutory deadline for the Final Written Decision is 2026-11-20.
• Settlement / termination: No settlement or termination recorded as of 2026-05-15.
• Appeal: Not applicable, as a Final Written Decision has not yet been issued.
• Defensive value: All 20 claims of the patent are currently under review in an instituted IPR. If a defendant is being asserted against based on these claims, their validity is uncertain, offering a strong defensive position. Any infringement theory relying on claims 1-20 is directly impacted by this ongoing PTAB challenge.

Strategic summary

Currently, all 20 claims (claims 1-20) of US Patent 11763316 are UNTESTED in terms of a Final Written Decision by the PTAB, but they are all CHALLENGED and INSTITUTED for trial in IPR2025-01061. This means the PTAB has found a reasonable likelihood that these claims are unpatentable based on the asserted prior art. Until a Final Written Decision is issued, the validity of these claims remains uncertain.

The estoppel landscape is currently limited. If IPR2025-01061 proceeds to a Final Written Decision, TikTok Inc. (and its privies) would be estopped from asserting invalidity grounds they raised or reasonably could have raised against claims 1-20 in future District Court or ITC proceedings. For other potential defendants, however, the specific prior art combination (Heckel, Dietz, and Stickypad) used in this IPR, and any other art that could have been combined with it, would likely still be available for challenging validity, depending on the exact scope of estoppel in the FWD.

A pattern signal here is that Unified Patents has flagged this patent as part of its "Patent Trust III" challenge, and the IPR was filed by TikTok Inc., a common target for NPEs (Non-Practicing Entities) that Unified Patents aims to protect. The patent owner, THOMAS L. DISTEFANO III (via Distefano Website Innovations LLC), appears to be an asserting entity, and the patent's short remaining term (expires 2026-11-15) suggests an urgency for resolution.

Recommended next steps

Given that IPR2025-01061 has been instituted on all claims, the most critical upcoming milestone is the Final Written Decision, which is due by 2026-11-20. A defendant should closely monitor this proceeding, as a decision canceling claims 1-20 would significantly impact the patent's value and any ongoing or threatened litigation.

Review the institution decision for IPR2025-01061 at the USPTO PTAB E2E system to understand the specific arguments and findings that led to institution: https://ptab.uspto.gov/ptabfn/details.php?id=IPR2025-01061. The reasoning in the institution decision will provide insight into the PTAB's initial assessment of the unpatentability of claims 1-20.

If a demand letter or complaint cites claims 1-20, advise the defendant that these claims are currently facing a significant challenge at the PTAB, and their validity is in question. Consider staying any parallel litigation, if possible, pending the outcome of the IPR.

The patent is set to expire on 2026-11-15. This is very close to the IPR's FWD due date. The timing could impact the parties' motivations, potentially leading to an earlier settlement if the patent owner wishes to realize value before expiration, or a more aggressive defense if the patent owner believes the claims are strong.

A defendant should also perform its own prior art search, distinct from the IPR, to identify any additional grounds for invalidity that were not raised or could not have been reasonably raised in IPR2025-01061, in case the IPR does not result in a full invalidation.

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Citations:
https://patents.google.com/patent/[US11763316B2](/patent/US11763316B2)/en