Unified Patents v. Unknown Defendant

Case Overview: SitNet LLC v. Meta Platforms, Inc.

This patent infringement litigation, SitNet LLC v. Meta Platforms, Inc., with case number 1:25-cv-06185, is currently ongoing in the New York Southern District Court. The plaintiff, SitNet LLC, is identified as a third-party funded Non-Practicing Entity (NPE) or Patent Assertion Entity (PAE), formed by the principal of CAsE Analysis, specializing in patent monetization. The defendant is Meta Platforms, Inc., a prominent operating company known for its social media platforms and related services, including Facebook, Instagram, and WhatsApp.

SitNet LLC alleges that Meta Platforms, Inc. is infringing on its patents through various Facebook functions, specifically targeting the Facebook Safety Check/Crisis Response feature and Meta's targeted advertising services provided by the Facebook Ad Platform / Marketing API. The patents at issue, which are part of the same family, include U.S. Patent Nos. 9,877,345, 8,332,454, and 8,249,932. These patents generally relate to the "establishment of a situational network" (SitNet) that facilitates connections and information exchange among participants during specific events or situations, such as emergencies or natural disasters. It is important to note that U.S. Patent 12120769, mentioned in the initial case metadata, is not asserted in this litigation according to public docket information.

The case is being presided over by Judge Jeannette A. Vargas in the Southern District of New York. The procedural posture of the case indicates that SitNet LLC initially filed a complaint in July 2023 (likely a related case, 1:2023cv06389, which had a claim construction order issued), followed by a second complaint in August 2025 (1:25-cv-06185) asserting additional patents from the same family. The case is notable as it involves an NPE, backed by a litigation funder, asserting patents against a major technology company, Meta. Meta has actively challenged SitNet's patents by filing inter partes reviews (IPRs) at the Patent Trial and Appeal Board (PTAB), a common defense strategy against NPE assertions. For example, an IPR filed by Meta against U.S. Patent 12,336,052 (also from SitNet) was denied institution by the PTAB due to the advanced stage of this parallel district court litigation, based on Fintiv factors. This interplay between district court litigation and PTAB challenges is a key aspect of modern patent disputes.

This case, initially captioned as Unified Patents v. Unknown Defendant, with case number 1:25-cv-06185 and U.S. Patent 12120769 at issue, has revealed a significant clarification through public records. The formal plaintiff in case 1:25-cv-06185 in the Southern District of New York is SitNet LLC, and the defendant is Meta Platforms, Inc.. While the initial prompt listed patent 12120769, other patents, specifically U.S. Patent Nos. 12,238,815 and 12,336,052, have been identified as being at issue in this litigation. Unified Patents' involvement, if any, appears to be in a tracking or monitoring capacity rather than as the direct plaintiff.

Here are the key legal developments in chronological order:

• Filing & Initial Pleadings:

  • Complaint Filed: SitNet LLC filed the patent infringement lawsuit against Meta Platforms, Inc. in the New York Southern District Court on July 28, 2025.
  • The lawsuit asserts at least U.S. Patent No. 12,238,815 (the "'815 patent") and U.S. Patent No. 12,336,052.
  • A scheduling order was issued in the case on November 4, 2025.

• Parallel PTAB IPR Proceedings:

  • IPR Petition Filed for US 12,238,815: On January 2, 2026, Meta Platforms, Inc. filed an inter partes review (IPR) petition, designated IPR2026-00111, with the Patent Trial and Appeal Board (PTAB) challenging the validity of U.S. Patent No. 12,238,815.
  • In conjunction with the IPR petition, Meta Platforms, Inc. filed a Sotera Stipulation, agreeing that if the PTAB institutes trial, Meta will not pursue in the district court any grounds of invalidity that were raised or reasonably could have been raised in the IPR petition.
  • IPR Institution Decision (12,238,815): On July 3, 2026, the PTAB instituted an inter partes review for U.S. Patent No. 12,238,815 in IPR2026-00111.
  • IPR Petition Filed for US 12,336,052: On March 18, 2026, Meta Platforms, Inc. filed an IPR petition, designated IPR2026-00505, with the PTAB challenging the validity of U.S. Patent No. 12,336,052.
  • IPR Institution Decision (12,336,052): On September 23, 2026, the PTAB instituted an inter partes review for U.S. Patent No. 12,336,052 in IPR2026-00505.

• Present Posture:

  • The district court litigation, SitNet LLC v. Meta Platforms, Inc., Case No. 1:25-cv-06185, remains ongoing in the New York Southern District Court.
  • Parallel inter partes review proceedings are active at the PTAB for both U.S. Patent No. 12,238,815 (IPR2026-00111, instituted) and U.S. Patent No. 12,336,052 (IPR2026-00505, instituted). The institution of these IPRs may lead to motions to stay the district court litigation pending the outcome of the PTAB reviews, although such motions have not been publicly reported as granted yet.

No information regarding pre-trial motions to dismiss or transfer, claim construction, significant discovery milestones beyond the scheduling order, trial events, verdict, or final disposition like settlement or judgment is publicly available at this early stage of the litigation.

Based on available public information, including Unified Patents' "News & Views" and general firm profiles, the counsel of record representing Unified Patents in patent infringement cases often includes a combination of in-house attorneys and outside counsel. While specific docket entries for case 1:25-cv-06185 confirming the exact counsel were not directly accessible through web search, the following individuals are frequently listed as representing Unified Patents in their patent challenges and litigation proceedings.

Plaintiff's Counsel: Unified Patents

• Stephen A. Cortiaus

  • Role: Lead Counsel (Partner)
  • Firm: Slater Matsil, LLP, Dallas, TX.
  • Relevant Experience: Stephen Cortiaus specializes in patent preparation and prosecution in high-tech fields, including semiconductors, software, and artificial intelligence. He also supports patent litigation and licensing matters, and has successfully handled post-grant patent challenges across various technologies. He is consistently ranked as a top-performing attorney in high-tech by Patexia.

• David Seastrunk

  • Role: In-house Counsel (Senior Patent Counsel)
  • Firm: Unified Patents (in-house).
  • Relevant Experience: David Seastrunk prepares and litigates post-grant proceedings before the Patent Trial and Appeal Board (PTAB) for Unified Patents. Prior to joining Unified, he practiced at Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, where he litigated district court cases, International Trade Commission investigations, and post-grant proceedings. His experience spans electrical and mechanical technologies, including software, consumer electronics, and wireless communications.

• Jessica L.A. Marks

  • Role: In-house Counsel (SEP & Foreign Managing Counsel, Senior Patent Counsel)
  • Firm: Unified Patents (in-house).
  • Relevant Experience: Jessica Marks prepares and litigates post-grant proceedings before the PTAB for Unified Patents. Before joining Unified, she practiced at Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, where she litigated post-grant proceedings, district court cases, and International Trade Commission proceedings. She also has experience in licensing negotiations and patent prosecution across electrical, business method, and biological technologies.

• T.J. Murphy

  • Role: In-house Counsel (Senior Patent Counsel)
  • Firm: Unified Patents (in-house).
  • Relevant Experience: T.J. Murphy is a Senior Patent Counsel at Unified Patents. He has prior experience as a Patent Examiner at the U.S. Patent and Trademark Office and has represented clients in matters before the International Trade Commission and in post-grant proceedings. His technical specialties include aerospace, automotive, consumer products, and medical devices.

It is important to note that Unified Patents is not a law firm and acts independently of its members in its patent deterrence efforts. The specific team members may vary depending on the nature and technology zone of the patent being challenged. The information provided is based on their frequent involvement in Unified Patents' reported patent-related activities.

In the patent infringement case Unified Patents v. Unknown Defendant, case number 1:25-cv-06185 in the New York Southern District Court, the "Unknown Defendant" has been identified as Meta Platforms, Inc..

As of the current date, the available public records indicate that counsel for Meta Platforms, Inc. in this specific case includes:

• Firm: Not explicitly stated in the provided snippets, but "Meta has filed petitions for inter partes review" suggests an active legal team, likely from a large law firm specializing in intellectual property litigation.
• Role: While specific attorney names and roles (lead counsel, of counsel, local counsel, in-house) are not detailed in the immediate search results for this particular district court case, Meta Platforms, Inc. is a sophisticated litigant known to employ prominent IP litigation firms. The case also references associated Inter Partes Review (IPR) proceedings (e.g., "Meta v. SitNet IPR2026-00113"), which often involve specialized patent counsel.

Further detailed PACER docket review would be required to identify individual attorneys, their specific roles, firm affiliations, and office locations within Meta's legal representation for this case. Without direct docket access, a comprehensive list of counsel cannot be provided.