Birchtech Corp., formerly known as Midwest Energy Emissions Corp. until its rebranding in October 2024, is an environmental technology company headquartered in Corsicana, Texas. Founded in 2008, the company is publicly traded on the TSX, OTCQB, and NYSE American under the ticker symbol BCHT. Birchtech Corp. is a relatively small enterprise, reporting approximately 10-20 employees and annual revenue in the range of $15-20 million as of late 2025 to early 2026.
The company specializes in specialty activated carbon technologies for air and water purification. Its primary offerings include patented SEA® sorbent technologies for mercury emissions capture in the coal-fired utility sector, recognized as a "Best Available Control Technology." Birchtech is also actively developing disruptive water purification technologies focused on the removal of "forever chemicals" such as PFAS and PFOS from potable water.
Birchtech Corp. is an operating company that actively enforces its intellectual property rights. Its litigation posture reflects a company defending its patented technologies while also asserting them against alleged infringers. With one plaintiff case and four defendant cases in the tracked data, Birchtech frequently acts as a patent owner initiating infringement lawsuits against utilities and other entities, while also defending the validity of its patents at the Patent Trial and Appeal Board (PTAB).
Notably, Birchtech Corp. was awarded an approximately $78 million final judgment in December 2025 following a patent infringement lawsuit initiated in 2019 against 43 defendants, including several major power utilities. The case "CERT Operations II LLC et al. v. Birchtech Corp." on the Court of Appeals for the Federal Circuit, dated January 2026, represents an appeal related to this significant judgment. Birchtech's plaintiff case, "Midwest Energy Emissions Corp. et al. v. Berkshire Hathaway Energy Company et al." in the Southern District of Iowa, stems from lawsuits filed in July 2024. The PTAB cases, "Wisconsin Power & Light Co. et al. v. Birchtech Corp.," "Unknown Petitioner v. Birchtech Corp.," and "Union Electric Co. v. Birchtech Corp.," indicate challenges to Birchtech's patents by third parties. The company utilizes these patent enforcement actions to secure licensing agreements within the industry.