Birchtech Corp. f/k/a Midwest Energy Emissions Corp.

Birchtech Corp., formerly known as Midwest Energy Emissions Corp., is an environmental services and technology company specializing in activated carbon technologies for air and water purification. The company changed its name to Birchtech Corp. in October 2024. Founded in 2008, Birchtech is publicly traded on the TSX (BCHT) and OTCQB (BCHT). Its headquarters are located in Corsicana, Texas. As of May 2026, Birchtech has a market cap of $35.2 million and a trailing 12-month revenue of $17.6 million as of December 31, 2025. The company has an estimated 11-20 employees.

Birchtech provides patented Sorbent Enhancement Additive (SEA®) technologies for mercury emissions capture in the coal-fired utility sector. These technologies are designed to reduce mercury emissions at a lower cost and with less operational impact than other methods, while preserving the marketability of byproducts. The company is also developing water purification technologies, with a focus on removing "forever chemicals" like PFAS and PFOS from potable water.

Birchtech's patent litigation posture primarily involves defending its intellectual property. The company has been a defendant in two tracked cases, both at the Patent Trial and Appeal Board (PTAB). These cases, Unified Patents Inc. v. Birchtech Corp. f/k/a Midwest Energy Emissions Corp. and Berkshire Hathaway Energy Company v. Birchtech Corp. f/k/a Midwest Energy Emissions Corp., were filed in 2025.

Notably, as Midwest Energy Emissions Corp., the company secured a $57 million patent infringement verdict in March 2024 against several coal refiners in the U.S. District Court for the District of Delaware. This verdict involved the infringement of two patents related to their SEA® Technologies for mercury capture. The company has engaged in broader patent enforcement efforts, with some cases consolidated into a multi-defendant patent enforcement campaign (MDL No. 3132).