Greenthread LLC v. Intel Corporation

This Inter Partes Review (IPR) proceeding, IPR2023-00260, involved patent owner Greenthread LLC and petitioner Intel Corporation, concluding in a settlement at the Patent Trial and Appeal Board (PTAB). Greenthread LLC is identified as a patent assertion entity (NPE) or patent owner (PAE), originating from an individual inventor, and is actively involved in asserting its intellectual property in the semiconductor sector. Intel Corporation is a global technology giant known for designing and manufacturing computer processors and other hardware components for various devices. The IPR challenged U.S. Patent No. 10,734,481, which is part of a portfolio of patents generally directed to semiconductor devices featuring graded dopant regions, specifically concerning an optoelectronic device with controlled graded dopant concentration. These patented architectures aim to create static electric fields within semiconductor layers to improve charge carrier movement and device performance.

The IPR was initiated by Intel in response to an underlying patent infringement lawsuit, Greenthread, LLC v. Intel Corporation et al. (6:22-cv-00105), filed in the U.S. District Court for the Western District of Texas. In that litigation, Greenthread accused Intel's 10th, 11th, and 12th generation semiconductor devices, such as the Comet Lake, Tiger Lake, and Alder Lake-series, of infringement. These allegedly infringing semiconductors were incorporated into various Dell laptop products. While the initial district court case was before Judge Alan D Albright, claims against Intel were later transferred to the District of Oregon (3:22-cv-02001). The PTAB serves as a critical venue for challenging patent validity due to its specialized administrative patent judges, streamlined procedures, and a lower "preponderance of the evidence" burden of proof for invalidity compared to the "clear and convincing" standard in district courts. This makes IPRs a strategic tool for defendants to resolve patent disputes, often resulting in stays of concurrent district court litigation.

This case is notable as part of a broader, aggressive patent assertion campaign by Greenthread LLC against multiple major semiconductor companies. Greenthread has initiated numerous infringement suits and related IPRs against industry players like Cirrus Logic, Micron Technology, Western Digital, ON Semiconductor, OmniVision Technologies, and Texas Instruments. The settlement of IPR2023-00260, along with other IPRs filed by Intel against Greenthread, highlights the strategic interplay between district court litigation and PTAB proceedings in the semiconductor industry. The technical subject matter of the patents, focused on foundational semiconductor device architecture, further underscores the significance of these disputes for the industry's innovation and competition landscape.

Key Legal Developments and Outcome

District Court Litigation (W.D. Texas and D. Oregon)

• Filing & Initial Pleadings: Greenthread LLC initiated patent infringement litigation against Intel Corporation, Dell Inc., and Dell Technologies Inc. in the U.S. District Court for the Western District of Texas (Case No. 6:22-cv-00105) on January 27, 2022. The complaint accused Intel's 10th, 11th, and 12th generation semiconductors of infringing U.S. Patent No. 10,734,481, among others. Summons were returned executed by February 7, 2022, and Intel, along with Dell, filed a notice of an agreed extension to respond to the complaint by April 8, 2022.

• Pre-trial Motions of Substance:

  • Motion to Sever and Transfer Venue: Intel filed a motion to sever Greenthread's claims against Intel and transfer the venue of those claims to Oregon, while staying claims against Dell based on accused Intel products. This motion was granted by the Western District of Texas on December 27, 2022. Following the transfer, a new case was opened in the U.S. District Court for the District of Oregon (Case No. 3:22-cv-02001).
  • Motions to Stay Pending IPR: While a specific motion to stay pending IPR in the Greenthread v. Intel case isn't explicitly detailed as granted or denied in the provided search results, it is a common defensive strategy. In a related case, Greenthread v. ON Semiconductor, a stay pending IPR was granted in the District of Delaware on April 19, 2024, leading to administrative closure of the case on April 22, 2024. Delaware courts, in particular, consider factors such as simplification of issues, stage of litigation, and prejudice to the non-moving party when evaluating motions to stay. The early stage of litigation and the potential for IPR to cancel or narrow claims generally favor granting a stay.

• Claim Construction (Markman) Outcomes: The district court in the Western District of Texas issued a preliminary claim construction order adopting Greenthread's constructions in the original case (6:22-cv-00105-ADA). After the claims against Intel were severed and transferred, the District of Oregon adopted the Western District of Texas's preliminary claim construction.

• Final Disposition: The district court litigation between Greenthread and Intel (6:22-cv-00105 and 3:22-cv-02001) was dismissed on April 24, 2023. This dismissal likely coincided with the settlement reached in the parallel IPR proceeding, as discussed below.

Parallel PTAB IPR Proceedings

• IPR Filing and Institution: Intel Corporation filed IPR2023-00260 challenging U.S. Patent No. 10,734,481 on November 28, 2022. The PTAB proceeding concluded in a settlement.

• Effect on Litigation: The settlement of IPR2023-00260, along with other IPRs filed by Intel against Greenthread's patents, was a significant factor in the dismissal of the district court litigation. For example, Intel also filed IPR2023-00548 on January 30, 2023, challenging U.S. Patent No. 8,421,195, which was terminated on May 18, 2023. Another IPR, IPR2023-00420, challenging U.S. Patent No. 11,121,222, filed by Intel on December 28, 2022, was terminated on July 11, 2023. The termination of these IPRs via settlement often leads to the resolution of the corresponding district court cases, as seen here. The dismissal of the district court case on April 24, 2023, suggests an early resolution prompted by the parallel PTAB proceedings and subsequent settlement.

In this IPR proceeding, Greenthread LLC was represented by counsel from several firms, including Farnan LLP. While specific roles for each attorney in the IPR itself are not explicitly detailed in publicly available information, their appearances in related district court litigation provide insight into their involvement.

Here are the identified counsel of record for Greenthread LLC:

• Alan L. Whitehurst

  • Role: Likely lead or primary counsel in district court proceedings.
  • Firm: Whitehurst, Harkness, LaPointe & Hammers, P.L.L.C. (Austin, TX office is commonly listed).
  • Note: Mr. Whitehurst has appeared on behalf of Greenthread LLC in several district court patent infringement cases, including the initial lawsuit against Intel (W.D. Tex. Case No. 6:2022cv00105) and other cases against Texas Instruments and ON Semiconductor.

• Brian E. Farnan

  • Role: Local counsel in Delaware district court cases.
  • Firm: Farnan LLP (Wilmington, DE).
  • Note: Mr. Farnan is noted as local counsel for Greenthread in patent litigation in the District of Delaware, such as Greenthread, LLC v. ON Semiconductor Corporation.

• Michael J. Farnan

  • Role: Local counsel in Delaware district court cases.
  • Firm: Farnan LLP (Wilmington, DE).
  • Note: Mr. Farnan also appears as local counsel for Greenthread in Delaware alongside Brian E. Farnan.

• Emily Brantley Tate

  • Role: Counsel.
  • Firm: Tate IP Law P.C. (Austin, TX).
  • Note: Ms. Tate entered an appearance for Greenthread, LLC in a case against Texas Instruments Incorporated in the Eastern District of Texas (E.D. Tex. Case No. 2:2023cv00157).

• Archis Ozarkar

  • Role: Counsel.
  • Firm: Not explicitly stated for this IPR, but associated with Greenthread's litigation team.
  • Note: Mr. Ozarkar is mentioned as part of the "substantial litigation team" for Greenthread in the Greenthread, LLC v. ON Semiconductor Corporation case.

• Arvind Jairam

  • Role: Counsel.
  • Firm: Not explicitly stated for this IPR, but associated with Greenthread's litigation team.
  • Note: Mr. Jairam is also mentioned as part of Greenthread's litigation team in the Greenthread, LLC v. ON Semiconductor Corporation case.

It is important to note that while these attorneys are identified as representing Greenthread in related patent litigation, specific appearances and roles within the IPR2023-00260 docket itself would require direct access to the PTAB's electronic filing system (PTAB-E2E or equivalent) or a detailed PACER search for the underlying district court case that led to the IPR. The provided search results primarily detail counsel for Greenthread in associated district court cases and other IPRs.

Intel Corporation was represented by a team of attorneys from Kirkland & Ellis LLP and by in-house counsel for both the IPR proceeding IPR2023-00260 and the underlying district court litigation Greenthread, LLC v. Intel Corporation et al. (6:22-cv-00105).

Counsel for Intel Corporation:

• J. Stephen Ravel

  • Role: Lead Counsel, and local counsel in the Western District of Texas.
  • Firm: Kelly, Hart & Hallman LLP (Texas).
  • Note: Ravel has appeared in other patent litigation cases in the Western District of Texas.

• Jon Carter

  • Role: Lead Counsel (Pro Hac Vice).
  • Firm: Kirkland & Ellis LLP (New York, NY).
  • Note: Kirkland & Ellis LLP is a prominent firm in intellectual property litigation.

• Christopher DeCoro

  • Role: Lead Counsel (Pro Hac Vice).
  • Firm: Kirkland & Ellis LLP (New York, NY).

• Nyika O. Strickland

  • Role: Counsel (Pro Hac Vice).
  • Firm: Kirkland & Ellis LLP (Chicago, IL).

• Abigail Lauer Litow

  • Role: Counsel (Pro Hac Vice).
  • Firm: Kirkland & Ellis LLP (Washington, D.C.).

• John Rhine

  • Role: Counsel (Pro Hac Vice).
  • Firm: Kirkland & Ellis LLP (Washington, D.C.).

• Bao Nguyen

  • Role: Counsel (Pro Hac Vice).
  • Firm: Kirkland & Ellis LLP (San Francisco, CA).

• Steven R. Rodgers

  • Role: Senior Vice President and General Counsel (In-house).
  • Firm: Intel Corporation.
  • Note: Mr. Rodgers leads Intel's Law and Policy Group and has extensive experience in intellectual property and litigation, having joined Intel in 2000 as a senior litigation attorney.

• April Miller Boise

  • Role: Executive Vice President and Chief Legal Officer (In-house).
  • Firm: Intel Corporation.
  • Note: Ms. Miller Boise joined Intel in July 2022 and has over 25 years of experience across global markets and industries, including technology commercial transactions, regulatory compliance, intellectual property, and corporate governance.

It is important to note that some sources discussing Intel's representation in various patent matters also mention Desmarais LLP, particularly in relation to a full defense victory for Intel in a patent infringement lawsuit in Delaware federal court concerning computer memory architecture. Potter Anderson has also served as co-counsel for Intel in several patent litigation matters related to microprocessor technology in Delaware federal and state courts. Sterne, Kessler, Goldstein & Fox P.L.L.C. represented Intel in IPR petitions against Qualcomm. While these firms have represented Intel in other patent matters, the specific counsel appearing for Intel in IPR2023-00260 and the related district court case Greenthread, LLC v. Intel Corporation et al. (6:22-cv-00105) primarily includes attorneys from Kirkland & Ellis LLP and Kelly, Hart & Hallman LLP, along with Intel's in-house legal team.