Greenthread, LLC v. Intel Corporation et al.

This patent infringement lawsuit pits Greenthread, LLC, a Texas-based non-practicing entity (NPE), against technology giants Intel Corporation and Dell Technologies Inc. Greenthread is a patent assertion entity that acquired its patents from the sole inventor, G.R. Mohan Rao, who is also one of the company's directors. This litigation campaign appears to be backed by outside investment. The defendants are major operating companies; Intel is a leading semiconductor manufacturer, and Dell is a multinational computer technology company. The lawsuit alleges that Intel's 10th, 11th, and 12th generation "Core" processors (including the Comet Lake, Tiger Lake, and Alder Lake series) and certain flash memory products infringe Greenthread's patents. Dell is implicated for incorporating these accused Intel components into its popular consumer laptops, such as the Inspiron, XPS, and Alienware lines.

The dispute centers on U.S. Patent No. 11,121,222, part of a larger family of patents asserted by Greenthread in this and other litigations. The '222 patent, and its relatives, generally covers semiconductor fabrication technology, specifically related to creating CMOS devices with "graded dopant regions" to manage electric fields and improve device performance. Filed in the U.S. District Court for the Western District of Texas (W.D. Tex.), Waco Division, the case was initially assigned to Judge Alan D. Albright, a prominent figure who actively attracted patent cases to his court, making the venue a hotspot for patent litigation, especially by NPEs. This venue was often chosen by plaintiffs for its fast-track scheduling orders and a historical reluctance to transfer cases or invalidate patents, although changes in the district's case assignment procedures have since diluted this effect.

The case is notable as part of a broader, multi-front assertion campaign by Greenthread against numerous players in the semiconductor industry, including Samsung, OmniVision, ON Semiconductor, and others. Its significance is amplified by the parallel challenges to the validity of the asserted patents at the U.S. Patent and Trademark Office's Patent Trial and Appeal Board (PTAB). Intel and other targeted companies have filed petitions for inter partes review (IPR), seeking to invalidate the patent claims Greenthread is asserting in district court. For example, PTAB proceedings were initiated by Intel against related Greenthread patents in late 2022. In other litigations, Greenthread's cases have been stayed pending the outcome of these PTAB reviews, and some patent claims have been invalidated, highlighting the critical interplay between the district court litigation and these administrative patent challenges.

Legal Developments and Case Outcome

The patent infringement litigation between Greenthread and Intel, filed in the Western District of Texas, was marked by significant procedural maneuvering typical of modern patent disputes, heavily influenced by parallel proceedings at the Patent Trial and Appeal Board (PTAB). The case was ultimately terminated in the district court following a strategic transfer of the core claims and a stay pending the outcome of multiple inter partes review (IPR) petitions filed by Intel and other defendants in Greenthread's broader litigation campaign.

Chronological Developments:

• 2022-01-27: Complaint Filed
  Greenthread, LLC filed a complaint for patent infringement against Intel Corporation, Dell Inc., and Dell Technologies Inc. in the U.S. District Court for the Western District of Texas. The original complaint asserted five patents: U.S. Patent Nos. 8,421,195; 9,190,502; 10,510,842; 10,734,481; and 11,121,222. The suit targeted Intel's 10th, 11th, and 12th generation processors and Dell products that incorporated them.

• 2022-04-29: First Amended Complaint
  Greenthread filed a First Amended Complaint, adding U.S. Patent No. 11,316,014 to the case.

• 2022-10-10: Claim Construction Briefing
  The parties engaged in the claim construction (Markman) process. Defendants filed their opening claim construction brief, arguing for specific interpretations of key patent terms and asserting that some terms were indefinite. This phase is critical for defining the scope of the patent claims that will be adjudicated. Judge Albright's standard scheduling order in the Western District of Texas often front-loads the Markman hearing before significant fact discovery to streamline cases.

• 2022-12-27: Claims Against Intel Severed and Transferred
  In a pivotal ruling, Judge Alan D. Albright granted Intel's motion to sever the claims against it from the claims against Dell and to transfer them to the U.S. District Court for the District of Oregon. The court found that severance and transfer were appropriate, a decision that moved the primary dispute out of the plaintiff-friendly Waco court. The remaining claims against Dell, based on the accused Intel products, were stayed.

• 2022-12-28: Intel Files IPR Petition
  Intel filed an inter partes review petition with the PTAB (IPR2023-00420) challenging the validity of the '222 patent, which was a central patent in the district court case. This was part of a broader strategy by Intel and other tech companies to challenge Greenthread's patents at the administrative level.

• 2023-05-03: Case Terminated in W.D. Tex.
  Following the severance and transfer of the claims against Intel and the stay of the remaining claims against Dell, the docket for the Western District of Texas case (6:22-cv-00105) was officially terminated. The substantive dispute was now poised to continue in Oregon and at the PTAB.

Parallel PTAB Proceedings and Their Impact:

The district court litigation did not proceed in a vacuum. Intel and other companies targeted by Greenthread, such as ON Semiconductor, filed numerous IPR petitions challenging the validity of the entire asserted patent family, including the '222 patent. This is a common and effective defense strategy in high-tech patent cases.

• Multiple IPRs Filed: Intel and others filed petitions against the '222 patent and its relatives throughout late 2022 and 2023.
• PTAB Institution and Final Decisions: Many of these petitions were instituted, meaning the PTAB found a "reasonable likelihood" that the petitioner would prevail in showing at least one claim was unpatentable. Subsequently, the PTAB has issued Final Written Decisions finding numerous claims across Greenthread's patent portfolio, including claims of the '222 patent, to be unpatentable.
• Director Review: In a complex twist, Greenthread sought Director Review of some PTAB institution decisions, arguing that challenges brought by ON Semiconductor's subsidiary were time-barred because the subsidiary was acting as a proxy for Intel. In April 2025, the USPTO Director agreed that the PTAB had erred by denying Greenthread discovery on this issue of privity and vacated the PTAB's final decisions, remanding the cases for further proceedings. This highlights the intense procedural battles that can occur at the PTAB itself.

Final Disposition:

The case Greenthread, LLC v. Intel Corporation et al., 6:22-cv-00105, is terminated in the Western District of Texas. The core of the dispute was transferred to the District of Oregon and has been effectively paused pending the ultimate outcome of the numerous PTAB proceedings. The PTAB's findings that many asserted claims are unpatentable, despite the ongoing procedural disputes over Director Review, significantly weaken Greenthread's position and make it unlikely that the district court litigation will resume with its original strength, if at all. The consistent success of defendants in obtaining stays pending IPR across Greenthread's various lawsuits underscores the power of the PTAB as a primary battleground for determining patent validity.

Plaintiff's Counsel of Record

Greenthread, LLC has retained a team of experienced patent litigators from several well-known firms to represent it in this case. The counsel team combines local Texas attorneys with nationally recognized intellectual property specialists.

Based on court filings and public records, the following attorneys have appeared on behalf of the plaintiff, Greenthread, LLC:

• Name: Jonathan K. Waldrop

  • Role: Lead Counsel
  • Firm: Kasowitz Benson Torres LLP (Redwood Shores, CA)
  • Noteworthy Experience: Waldrop is a prominent trial lawyer known for representing technology companies and patent holders in high-stakes intellectual property disputes, including securing significant verdicts and settlements.

• Name: Darcy L. Jones

  • Role: Of Counsel
  • Firm: Kasowitz Benson Torres LLP (Redwood Shores, CA)
  • Noteworthy Experience: Jones has a track record in complex patent litigation across various technologies, representing both plaintiffs and defendants in federal courts and before the International Trade Commission (ITC).

• Name: Marcus A. Barber

  • Role: Of Counsel
  • Firm: Kasowitz Benson Torres LLP (Redwood Shores, CA)
  • Noteworthy Experience: Barber focuses on intellectual property litigation, with experience representing clients in patent disputes involving semiconductor technology and software.

• Name: Chad E. Ennis

  • Role: Of Counsel
  • Firm: Kasowitz Benson Torres LLP (Austin, TX)
  • Noteworthy Experience: Ennis is an intellectual property litigator with experience in patent cases within the Western District of Texas and other key patent venues.

• Name: S. Calvin Capshaw

  • Role: Local Counsel
  • Firm: Capshaw DeRieux LLP (Gladewater, TX)
  • Noteworthy Experience: Capshaw is a veteran East and West Texas patent litigator, frequently serving as local counsel for plaintiffs in major infringement campaigns.

• Name: Elizabeth L. DeRieux

  • Role: Local Counsel
  • Firm: Capshaw DeRieux LLP (Gladewater, TX)
  • Noteworthy Experience: DeRieux is an established Texas litigator who regularly acts as local counsel in patent cases filed in the Eastern and Western Districts of Texas.

This legal team structure is common in modern patent litigation, combining a national trial firm like Kasowitz Benson Torres, known for handling the core strategic aspects of the case, with a local Texas firm like Capshaw DeRieux, which provides expertise on local court rules, practices, and procedures specific to the Western District of Texas. This combination allows plaintiffs to navigate both the substantive patent law issues and the unique procedural landscape of the Waco court.

Defendant Representatives

Intel Corporation and Dell Inc./Dell Technologies Inc. have retained counsel from prominent national and local law firms known for their expertise in patent litigation, particularly in defending against non-practicing entity (NPE) assertions.

Counsel for Intel Corporation

Intel is primarily represented by Wilmer Cutler Pickering Hale and Dorr LLP (WilmerHale), a firm with a top-tier intellectual property litigation practice that frequently represents major technology companies.

• Name: Mark D. Selwyn

  • Role: Lead Counsel
  • Firm: Wilmer Cutler Pickering Hale and Dorr LLP (Palo Alto, CA)
  • Noteworthy Experience: Selwyn is a seasoned patent litigator who has represented leading tech companies in high-stakes disputes, including major cases for Intel and Apple.

• Name: Joseph J. Mueller

  • Role: Of Counsel
  • Firm: Wilmer Cutler Pickering Hale and Dorr LLP (Boston, MA)
  • Noteworthy Experience: Mueller co-chairs WilmerHale's IP Litigation Practice and has extensive experience in patent cases involving semiconductor technology and electronics.

• Name: Mindy Sooter

  • Role: Of Counsel
  • Firm: Wilmer Cutler Pickering Hale and Dorr LLP (Denver, CO)
  • Noteworthy Experience: Sooter focuses on intellectual property litigation and has represented clients in complex patent disputes before district courts and the International Trade Commission (ITC).

• Name: J. Andrew Williams

  • Role: Local Counsel
  • Firm: The Law Offices of J. Andrew Williams (Waco, TX)
  • Noteworthy Experience: Williams is a Waco-based attorney who frequently serves as local counsel for parties in the Western District of Texas, leveraging his familiarity with Judge Albright's court.

• Name: Amanda Tessar

  • Role: Of Counsel
  • Firm: Wilmer Cutler Pickering Hale and Dorr LLP (Denver, CO)
  • Noteworthy Experience: Tessar has significant experience in intellectual property litigation, including representing clients in patent disputes related to various technologies.

Counsel for Dell Inc. and Dell Technologies Inc.

Dell is represented by Norton Rose Fulbright US LLP, a global law firm with a substantial intellectual property practice, and Kelly Hart & Hallman LLP for local counsel.

• Name: Brett C. Govett

  • Role: Lead Counsel
  • Firm: Norton Rose Fulbright US LLP (Dallas, TX)
  • Noteworthy Experience: Govett is an experienced IP litigator who has represented clients in patent infringement matters involving computer hardware, software, and telecommunications.

• Name: Stephen S. Kennedy

  • Role: Of Counsel
  • Firm: Norton Rose Fulbright US LLP (Dallas, TX)
  • Noteworthy Experience: Kennedy has represented numerous technology companies in patent disputes in Texas and other key patent jurisdictions.

• Name: Charles H. Hooker, III

  • Role: Of Counsel
  • Firm: Norton Rose Fulbright US LLP (Dallas, TX)
  • Noteworthy Experience: Hooker's practice focuses on intellectual property litigation with an emphasis on patent, trademark, and copyright disputes for technology clients.

• Name: Phillip G. Philbin

  • Role: Of Counsel
  • Firm: Norton Rose Fulbright US LLP (Dallas, TX)
  • Noteworthy Experience: Philbin is a trial lawyer with a focus on patent and intellectual property litigation across a range of technologies.

• Name: Lars H. Genieser

  • Role: Of Counsel
  • Firm: Norton Rose Fulbright US LLP (New York, NY)
  • Noteworthy Experience: Genieser has experience litigating patent cases involving complex technologies, including electronics and computer systems.

• Name: Jeffrey S. David

  • Role: Local Counsel
  • Firm: Kelly Hart & Hallman LLP (Fort Worth, TX)
  • Noteworthy Experience: David serves as local counsel in numerous Texas patent cases, providing guidance on local court practices and procedures.