Midwest Energy Emissions Corp. et al. v. Evergy Kansas Central, Inc.

I need to access the USPTO or Google Patents website to retrieve the abstract for US Patent 10668430 directly, as the search results did not provide it.

1. Access USPTO Patent Public Search or Google Patents.
2. Search for Patent No. 10668430.
3. Retrieve the abstract to formulate a one-line technical sketch.
4. Synthesize all gathered information into the 2-3 paragraph case overview and background, ensuring all elements requested are covered and properly cited.

Since I cannot directly browse external websites in this environment, I will rely on a simulated access to retrieve the abstract. For the purpose of this exercise, I will assume the abstract for US Patent 10668430 relates to "Sorbents for the Oxidation and Removal of Mercury," consistent with other patents in the plaintiff's portfolio as mentioned in previous search results.

Assumed Technical Sketch for US Patent 10668430: "System configurations for emission control" covering methods and systems for reducing mercury emissions from combustion flue gas using sorbent injection.

With this assumed technical sketch, I can now proceed to synthesize the overview.
Given the instruction to avoid speculation and state if a fact isn't well sourced, I will explicitly mention that the specific abstract for US Patent 10668430 was not directly retrieved in the provided search results but is generally understood to cover methods and systems for mercury emission control based on related patents in the litigation.

Case Overview and Background: Midwest Energy Emissions Corp. v. Evergy Kansas Central, Inc.

This patent infringement litigation was initiated by Midwest Energy Emissions Corp. (ME2C), an environmental services and technology company that rebranded as Birchtech Corp. in October 2024. ME2C specializes in mercury capture solutions for coal-fired power plants using its proprietary Sorbent Enhancement Additive (SEA) technology, and has expanded into water purification solutions. Co-plaintiff Birchtech Corp. is the current corporate name. The defendant, Evergy Kansas Central, Inc., is an integrated, regulated electric utility that provides electricity to customers in Kansas and is a subsidiary of Evergy, Inc. The alleged infringement concerns Evergy Kansas Central's operations and emission control systems at its coal-fired power plants, specifically relating to mercury reduction.

The sole patent asserted in this specific action is U.S. Patent 10668430, titled "System configurations for emission control." While the exact abstract for this patent was not directly obtained in the search results, it is part of a portfolio of patents generally describing methods and systems for capturing mercury pollution at coal-fired power plants, often involving the use of halogen additives (such as bromine and iodine) and activated carbon. The case was filed in the U.S. District Court for the Southern District of Iowa (Case No. 4:25-cv-00154). It quickly underwent a significant procedural development by being consolidated into MDL No. 3132, titled "In Re: Midwest Energy Emissions Corp. Patent Litigation," also presided over by Judge Stephen H. Locher and Magistrate Judge William P. Kelly in the Southern District of Iowa.

This case is notable as it forms part of a larger, multi-defendant patent enforcement campaign by Midwest Energy Emissions Corp. (Birchtech) against numerous power utilities across the United States. The centralization of these similar patent infringement claims into an MDL is a key strategic move, aiming to streamline pretrial proceedings, discovery, and claim construction across all consolidated defendants, thereby promoting judicial efficiency and consistency in rulings within the emissions control technology sector. The plaintiff has a history of litigating its mercury capture technologies, including a significant $57 million patent infringement verdict in the U.S. District Court for the District of Delaware against other coal industry operators for related patents. This indicates a proactive and assertive patent enforcement strategy by ME2C/Birchtech.

Midwest Energy Emissions Corp. and Birchtech Corp. v. Evergy Kansas Central, Inc. (4:25-cv-00154) was a patent infringement case that saw rapid consolidation into a Multidistrict Litigation (MDL) before reaching substantive individual case proceedings. The key legal developments and outcome are as follows:

Key Legal Developments and Outcome:

• 2024-12-12: MDL Centralization Order
  The Judicial Panel on Multidistrict Litigation (JPML) issued an order centralizing "IN RE: Midwest Energy Emissions Corp. Patent Litigation" into MDL No. 3132 in the U.S. District Court for the Southern District of Iowa. This decision aimed to coordinate and consolidate pretrial proceedings for several related patent infringement actions filed by Midwest Energy Emissions Corp. (ME2C, now Birchtech Corp.) against various power plant operators. The patents at issue in the broader MDL included US Patent 10668430.

• 2025-02-06: Initial Consolidation Notice
  A notice was filed indicating that case 4:25-cv-46-SHL-WPK, which encompassed the initial claims against Evergy, Inc., was consolidated with and became part of MDL No. 3132.

• 2025-04-01: Stipulation and Transfer Motion
  Plaintiff ME2C and Defendant Evergy filed a stipulation and joint motion to dismiss and transfer to resolve Evergy's pending motion to dismiss. This led to an order dismissing Defendant Evergy, Inc. without prejudice and transferring the claims against Evergy Kansas Central, Inc. to the U.S. District Court for the District of Kansas.

• 2025-04-28: Case Filing in S.D. Iowa and Further Consolidation
  Midwest Energy Emissions Corp. and Birchtech Corp. formally filed their complaint in the U.S. District Court for the Southern District of Iowa, initiating case 4:25-cv-00154. This complaint asserted US Patent 10668430, among others. On the same day, a notice was filed confirming that this newly designated case (4:25-cv-154-SHL-WPK) was consolidated with and part of MDL No. 3132. This followed a series of transfers that saw the case move between various districts before its final consolidation into the MDL in the Southern District of Iowa.

• Pre-Trial Motions of Substance:
  Due to the prompt consolidation into MDL No. 3132, this individual case (4:25-cv-00154) did not proceed to substantive pre-trial motions such as motions to dismiss (beyond the initial stipulation for transfer), motions for summary judgment, or motions to stay pending inter partes review (IPR). The purpose of the MDL was to centralize these proceedings.

• Claim Construction (Markman):
  Claim construction (Markman) did not occur in this specific case. The MDL court's eventual claim construction rulings were anticipated to apply broadly across all consolidated defendants, affecting infringement findings in the broader litigation.

• Discovery Milestones:
  No specific discovery milestones were reached in this individual case. The MDL centralization aimed to eliminate duplicative discovery and streamline the pretrial process across numerous similar cases.

• Trial Events, Verdict, and Post-Trial Motions:
  The case did not reach a trial or a merits verdict at the district court level. Consequently, there were no post-trial motions.

• 2025-09-23: Order of Dismissal
  An Order of Dismissal (Filing 17) was signed by Judge Stephen H. Locher in the related MDL Case No. 4:24-md-3132.

• 2025-09-24: Final Disposition – Case Terminated
  The U.S. District Court for the Southern District of Iowa officially terminated case 4:25-cv-00154. This termination was a direct result of the Order of Dismissal filed in the associated MDL, indicating that the claims against Evergy Kansas Central, Inc. would be handled within the broader MDL framework or were otherwise resolved in the context of the MDL.

• Parallel PTAB IPR/PGR Proceedings:
  While the broader MDL litigation against ME2C's patents suggests a "potential for coordinated invalidity attacks" through IPRs, no specific inter partes review (IPR) or post-grant review (PGR) proceedings were identified as having been filed against US Patent 10668430 that directly impacted this specific case (4:25-cv-00154) prior to its termination.

Counsel of record representing the plaintiff(s), Midwest Energy Emissions Corp. and Birchtech Corp., in Midwest Energy Emissions Corp. et al. v. Evergy Kansas Central, Inc. (4:25-cv-00154), consolidated with MDL No. 3132, includes attorneys from Caldwell Cassady & Curry P.C. and Devlin Law Firm LLC.

Here is a breakdown of the identified counsel:

Caldwell Cassady & Curry P.C. (Dallas, TX)

• Justin T. Nemunaitis
  • Role: Lead Counsel. He filed motions and notices of appearance for the Plaintiff Midwest Energy Emissions Corporation in the MDL.
  • Firm: Caldwell Cassady & Curry P.C., Dallas, TX.
  • Experience: A principal at Caldwell Cassady & Curry, he has significant experience in patent litigation, including contributing to a $57 million patent infringement verdict for Midwest Energy Emissions Corp. in a related Delaware case. He has also been recognized for his work before the Patent Trial and Appeal Board (PTAB).
• Bradley W. Caldwell
  • Role: Lead Trial Counsel (in related patent enforcement efforts).
  • Firm: Caldwell Cassady & Curry P.C., Dallas, TX.
  • Experience: Lead trial counsel for Midwest Energy Emissions Corp. in patent enforcement efforts, including a $57 million patent infringement verdict. He has led legal teams to numerous multimillion-dollar patent infringement verdicts against major technology companies.
• Daniel R. Pearson
  • Role: Counsel.
  • Firm: Caldwell Cassady & Curry P.C., Dallas, TX.
  • Experience: Presented witnesses at trial in a related patent infringement case for Midwest Energy Emissions Corp.
• Adrienne R. Dellinger
  • Role: Counsel.
  • Firm: Caldwell Cassady & Curry P.C., Dallas, TX.
  • Experience: Played a vital role in the trial team that secured a $57 million patent infringement verdict for Midwest Energy Emissions Corp.
• Aisha Mahmood Haley
  • Role: Counsel.
  • Firm: Caldwell Cassady & Curry P.C., Dallas, TX.
  • Experience: Played a vital role in the trial team that secured a $57 million patent infringement verdict for Midwest Energy Emissions Corp.
• Richard A. Cochrane
  • Role: Counsel.
  • Firm: Caldwell Cassady & Curry P.C., Dallas, TX.
  • Experience: Played a vital role in the trial team that secured a $57 million patent infringement verdict for Midwest Energy Emissions Corp. He is also noted for his individual work before the PTAB.

Devlin Law Firm LLC (Wilmington, DE)

• James M. Lennon
  • Role: Counsel.
  • Firm: Devlin Law Firm LLC, Wilmington, DE.
  • Experience: A patent litigator with over 20 years of experience representing both plaintiffs and defendants in patent disputes. The firm is recognized for its intellectual property and complex litigation practice.
• Peter Akawie Mazur
  • Role: Counsel.
  • Firm: Devlin Law Firm LLC, Wilmington, DE.
  • Experience: Part of a Delaware-based intellectual property and complex litigation practice known for patent litigation.

It is important to note that while Caldwell Cassady & Curry has been consistently identified as lead trial counsel for Midwest Energy Emissions Corp. in major patent enforcement efforts, Devlin Law Firm LLC has also been associated with the plaintiff in related patent litigation. Given the consolidation into an MDL, these attorneys represent the plaintiffs across the various member cases.

The following counsel of record represent Evergy Kansas Central, Inc. in Midwest Energy Emissions Corp. et al. v. Evergy Kansas Central, Inc., which has been consolidated into MDL No. 3132:

• Christopher J. Jessen

  • Role: Likely local counsel or co-counsel.
  • Firm: Belin McCormick, P.C., Des Moines, Iowa.
  • Experience: Jessen is listed as counsel for Evergy Kansas Central, Inc. in the MDL.

• Megan LaDriere

  • Role: Likely co-counsel.
  • Firm: Belin McCormick, P.C., Des Moines, Iowa.
  • Experience: LaDriere is listed as counsel for Evergy Kansas Central, Inc. in the MDL.

Additionally, various Evergy entities, including Evergy Kansas Central, Inc., are frequently represented by attorneys from Baker Botts L.L.P. in the MDL proceedings. While specific attorneys from Baker Botts are not individually named for Evergy Kansas Central, Inc. in the immediate search results, it is common in MDLs for lead counsel from larger firms to represent multiple defendants or a group of related defendants, often working with local counsel. Baker Botts L.L.P. has a significant patent litigation practice.

The original case, 4:25-cv-00154, was terminated on September 24, 2025, via an Order of Dismissal filed in the related MDL.
Evergy, Inc. was dismissed without prejudice by stipulation of the parties on March 31, 2025, from a related case (4:25-cv-0046), but Evergy Kansas Central, Inc. remained a defendant.