Midwest Energy Emissions Corp. v. Union Electric Co. d/b/a Ameren Missouri

Midwest Energy Emissions Corp. (ME2C® Environmental), now operating under its rebranded corporate name Birchtech Corp. as of October 2024, is an environmental services and technology company. It specializes in developing and delivering patented solutions for mercury capture from coal-fired power plant emissions using its Sorbent Enhancement Additive (SEA) technology. Union Electric Co. d/b/a Ameren Missouri, the defendant, is the largest electric utility in Missouri, providing service to approximately 1.3 million customers and operating several electricity generation facilities, including coal-fired power plants. The litigation alleges that Ameren Missouri's operations at its coal-fired power plants infringe ME2C's mercury emissions reduction technologies.

The core of the dispute revolves around US Patent 10668430, titled "Sorbents for the Oxidation and Removal of Mercury," which generally describes system configurations for emission control. This patent is part of a portfolio of patents asserted by Midwest Energy Emissions Corp. in similar lawsuits, all related to methods of capturing mercury pollution at coal-fired power plants using halogen additives (like bromine and iodine) and activated carbon. Other related patents in the broader litigation, for instance, cover chemical compositions for mercury reduction, sorbent injection systems and processes, and emission control methods for hazardous air pollutants.

This specific case, Midwest Energy Emissions Corp. v. Union Electric Co. d/b/a Ameren Missouri, case number 4:24-cv-00446, was originally filed in the U.S. District Court for the Southern District of Iowa. It has since been consolidated into MDL No. 3132, titled "IN RE: Midwest Energy Emissions Corp. Patent Litigation," with Judge Stephen H. Locher assigned to oversee the coordinated pretrial proceedings. The Judicial Panel on Multidistrict Litigation (JPML) centralized these cases in the Southern District of Iowa to streamline discovery, prevent inconsistent rulings on common factual questions (particularly claim construction and patent validity), and conserve judicial resources, as the cases involve numerous defendants operating coal-fired power plants allegedly infringing similar mercury emissions control patents. This venue is also significant as patent cases from this district are appealed to the Federal Circuit.

The case is notable as it represents a concerted patent enforcement campaign by Midwest Energy Emissions Corp. against numerous power utility companies across the United States. Although ME2C is an operating company, its aggressive assertion of patents against multiple alleged infringers in a campaign leading to an MDL is a significant event within the environmental technology and utility sectors. The company has a history of successful patent enforcement, including a $57 million verdict in a prior Delaware litigation involving related mercury-capture technology, underscoring the potential financial impact and validity of its asserted intellectual property. This broad litigation effort highlights ongoing disputes over emissions control technologies and their implementation within the coal-fired power industry.

Here's a summary of the key legal developments and current posture for the patent infringement litigation Midwest Energy Emissions Corp. v. Union Electric Co. d/b/a Ameren Missouri, Case No. 4:24-cv-00446, which is part of MDL No. 3132.

Chronological Legal Developments and Outcome:

• Initial Complaint and Pleadings: Midwest Energy Emissions Corp. (also known as ME2C, which changed its corporate name to Birchtech Corp. effective October 17, 2024, but continues to use its former name in this litigation) filed this patent infringement action against Union Electric Co. d/b/a Ameren Missouri in the U.S. District Court for the Southern District of Iowa. This case, along with other similar actions, initiated the litigation that would later be centralized. Prior to centralization, defendants in the Iowa action had filed Rule 12 motions. After the MDL was established, a "Complaint Affirmative Defenses, and, COUNTERCLAIM to Plaintiff's First Amended Complaint" was filed by MidAmerican Energy Company, indicating that answers and counterclaims are being filed within the consolidated proceedings.

• MDL Centralization (2024-12-12): Plaintiff Midwest Energy Emissions Corp. moved under 28 U.S.C. § 1407 to centralize the litigation. Defendants initially opposed centralization or suggested it be postponed. On December 12, 2024, the United States Judicial Panel on Multidistrict Litigation issued a Transfer Order, centralizing three actions (from Arizona, Eastern District of Missouri, and Southern District of Iowa) into MDL No. 3132, titled In Re: Midwest Energy Emissions Corp. Patent Litigation, in the Southern District of Iowa. Judge Stephen H. Locher was assigned as the transferee judge. The Panel found centralization warranted to eliminate duplicative discovery and prevent inconsistent pretrial rulings, especially concerning claim construction and patent validity. The case 4:24-cv-00446 was formally consolidated into MDL No. 3132 by a notice filed on December 17, 2024.

• Pre-Trial Motions:

  • Motions to Dismiss (Rule 12): Defendants had filed Rule 12 motions in the Iowa action prior to the MDL transfer, which they suggested be resolved before centralization. The status of these motions post-MDL transfer is not specified in the public information retrieved, but they would now be handled by the MDL court.
  • Motion to Centralize: Midwest Energy Emissions Corp. filed a motion to centralize the litigation, which the JPML granted.

• Claim Construction (Markman): As of the MDL centralization in December 2024, no Markman order has been issued. However, the Judicial Panel on Multidistrict Litigation specifically highlighted that "inconsistent pretrial rulings (particularly with respect to claim construction and issues of patent validity)" are a key concern that centralization aims to address, indicating that claim construction will be a significant upcoming phase for the MDL.

• Discovery Milestones: The MDL centralization order aims to "eliminate duplicative discovery," implying that discovery is either underway or anticipated across the consolidated cases. No specific discovery milestones for this individual case or the MDL have been publicly detailed as of the current date.

• Trial Events, Verdict, Post-Trial Motions: Given the recent centralization of the MDL in December 2024, the case is in its early pretrial stages. No trial events, verdicts, or post-trial motions have occurred.

• Settlement, Dismissal, Judgment, or Appeal – Current Posture: The litigation, including this specific case, remains active and is proceeding within MDL No. 3132 in the Southern District of Iowa. Plaintiff ME2C has indicated its intent to litigate infringement claims against defendants unwilling to license its technology, following a history of settlements and trials in a previous Delaware action. No final judgment, dismissal, or appeal has been reached.

• Parallel PTAB IPR/PGR Proceedings: A search of the USPTO's Patent Trial and Appeal Board (PTAB) database for US Patent 10668430 does not yield any active or completed IPR or PGR proceedings as of the current date.

Midwest Energy Emissions Corp. is represented by attorneys from Caldwell Cassady & Curry, PC, and The Simon Law Firm PC. Caldwell Cassady & Curry has served as lead trial counsel for Midwest Energy Emissions Corp. in its patent enforcement efforts since 2018, securing a $57 million patent infringement verdict in a recent Delaware federal jury trial.

Here is the counsel of record for the plaintiff(s):

Caldwell Cassady & Curry, PC (Dallas, Texas)

• Bradley Wayne Caldwell (Lead Counsel)
  • Firm: Caldwell Cassady & Curry, PC (Dallas, Texas)
  • Experience: Served as lead trial counsel for Midwest Energy Emissions Corp., securing a $57 million patent infringement verdict in a Delaware federal court for patent Nos. 10,343,114 and 10,596,517. He has also won multiple other significant patent infringement verdicts, including against Apple Inc. and Twitter Inc./X Corp.
• Justin Thomas Nemunaitis (Counsel)
  • Firm: Caldwell Cassady & Curry, PC (Dallas, Texas)
  • Experience: Presented witnesses at the Delaware patent infringement trial for Midwest Energy Emissions Corp. He is recognized for intellectual property and business disputes.
• Richard A. Cochrane (Counsel)
  • Firm: Caldwell Cassady & Curry, PC (Dallas, Texas)
  • Experience: Played a vital role in the trial team that secured the $57 million patent infringement verdict for Midwest Energy Emissions Corp.
• Austin Curry (Counsel)
  • Firm: Caldwell Cassady & Curry, PC (Dallas, Texas)
  • Experience: Counsel of record for the plaintiff in this case. The firm is known for its patent litigation success.

The Simon Law Firm PC (St. Louis, Missouri)

• Jeremiah W. Nixon (Counsel)
  • Firm: The Simon Law Firm PC (St. Louis, Missouri)
  • Experience: Counsel of record for the plaintiff in this case.
• Anthony G. Simon (Counsel)
  • Firm: The Simon Law Firm PC (St. Louis, Missouri)
  • Experience: Counsel of record for the plaintiff in this case. The Simon Law Firm PC is a prominent litigation firm.

Based on available information for Midwest Energy Emissions Corp. v. Union Electric Co. d/b/a Ameren Missouri, case number 4:24-cv-00446, which has been consolidated into MDL No. 3132, the following counsel appear to be representing the defendant(s):

Counsel for Union Electric Co. d/b/a Ameren Missouri:

• Richard Bennett Walsh, Jr.

  • Role: Counsel for Union Electric Co., Ameren Corp.
  • Firm: Not explicitly stated in the provided snippet, but associated with "Ameren Corp. et al."
  • Experience Note: Further research would be needed to detail his specific patent litigation experience.

• Robert M. Evans, Jr.

  • Role: Counsel for Ameren Corp.
  • Firm: Not explicitly stated in the provided snippet, but associated with "Ameren Corp. et al."
  • Experience Note: Further research would be needed to detail his specific patent litigation experience.

Additional attorneys listed in relation to "Ameren Corp. et al" and "Union Electric Co., Ameren Corp." from the PacerMonitor entry include:

• Bradley Wayne Caldwell

  • Firm: Caldwell Cassady Curry, PC
  • Experience Note: Caldwell Cassady Curry, PC is a firm known for its patent litigation practice, particularly for plaintiffs. His specific role for the defendant in this case would need further clarification.

• Richard A. Cochrane

  • Firm: Caldwell Cassady Curry, PC
  • Experience Note: Caldwell Cassady Curry, PC is a firm known for its patent litigation practice. His specific role for the defendant in this case would need further clarification.

• Austin Curry

  • Firm: Caldwell Cassady Curry, PC
  • Experience Note: Caldwell Cassady Curry, PC is a firm known for its patent litigation practice. His specific role for the defendant in this case would need further clarification.

• Jeremiah W. Nixon

  • Firm: The Simon Law Firm PC
  • Experience Note: Further research would be needed to detail his specific patent litigation experience.

• Justin Thomas Nemunaitis

  • Firm: Caldwell Cassady Curry, PC
  • Experience Note: Caldwell Cassady Curry, PC is a firm known for its patent litigation practice. His specific role for the defendant in this case would need further clarification.

• Anthony G. Simon

  • Firm: The Simon Law Firm PC
  • Experience Note: Further research would be needed to detail his specific patent litigation experience.

It is important to note that the PacerMonitor entry lists these attorneys generally in connection with the defendants. Given the case's transfer and consolidation into an MDL, the specific roles (e.g., lead counsel, local counsel) may evolve or be defined by the MDL proceedings. Gregory L. Nelson is identified as Senior Vice President, General Counsel, and Secretary at Ameren Corporation, suggesting an in-house counsel role, though his direct appearance in this specific patent case's docket wasn't explicitly confirmed.

Further investigation into the MDL docket (4:24-md-3132) would likely provide more definitive information on lead counsel appointments and specific roles within the consolidated proceedings.