Litigation summary

Here is a list of known litigation involving US patent 10933370, as of April 26, 2026:

1. IPR2025-01324

• Plaintiff(s): Union Electric Company
• Defendant(s): Birchtech Corp.
• Jurisdiction: Patent Trial and Appeal Board (PTAB)
• Case Number: IPR2025-01324
• Filing Date: July 18, 2025
• Outcome or Current Status: Terminated on November 20, 2025.

2. IPR2025-00688

• Plaintiff(s): Pacificorp et al
• Defendant(s): Birchtech Corp.
• Jurisdiction: Patent Trial and Appeal Board (PTAB)
• Case Number: IPR2025-00688
• Filing Date: March 24, 2025
• Outcome or Current Status: Terminated on February 10, 2026.

3. IPR2025-00687

• Plaintiff(s): Petitioner (specific name unknown)
• Defendant(s): Patent Owner (Birchtech Corp. as assignee, specific name for this case unknown)
• Jurisdiction: Patent Trial and Appeal Board (PTAB)
• Case Number: IPR2025-00687
• Filing Date: Unknown
• Outcome or Current Status: Settlement

4. IN RE: MIDWEST ENERGY EMISSIONS CORP. PATENT LITIGATION (MDL No. 3132)

• Plaintiff(s): Midwest Energy Emissions Corp. (ME2C), now Birchtech Corp.
• Defendant(s): Multiple defendants, including Berkshire Hathaway Energy Company, MidAmerican Energy Company, PacifiCorp, Alliant Energy Corporation, Alliant Energy Corporate Services, Inc., Interstate Power and Light Company, Wisconsin Power and Light Company, Ameren Corp., Union Electric Co. (d/b/a Ameren Missouri), and Salt River Project Agricultural Improvement and Power District.
• Jurisdiction: United States Judicial Panel on Multidistrict Litigation, centralized in the Southern District of Iowa.
• Case Number: MDL No. 3132 (also listed as 4:24-md-03132 in the original patent text).
• Filing Date: Centralization order dated December 12, 2024. Underlying lawsuits filed as early as July 30, 2024.
• Outcome or Current Status: Litigation centralized in the Southern District of Iowa. US10933370B2 is asserted in each action within this MDL, alleging infringement related to mercury capture technologies at coal-fired power plants.

5. United States District Court for the Southern District of Iowa (Underlying MDL Cases)

• Plaintiff(s): Midwest Energy Emissions Corp. (ME2C Environmental), now Birchtech Corp.
• Defendant(s): Berkshire Hathaway Energy Company, MidAmerican Energy Company, PacifiCorp, Alliant Energy Corporation, Interstate Power and Light Company, and Wisconsin Power and Light Company.
• Jurisdiction: Iowa Southern District Court
• Case Number(s): 4:24-cv-00243, 4:24-cv-00446, 4:24-cv-00447.
• Filing Date: July 30, 2024.
• Outcome or Current Status: Centralized as part of MDL No. 3132 in the Southern District of Iowa as of December 12, 2024.

6. United States District Court for the Eastern District of Missouri (Underlying MDL Case)

• Plaintiff(s): Midwest Energy Emissions Corp. (ME2C Environmental), now Birchtech Corp.
• Defendant(s): Ameren Corp. and Union Electric Co.
• Jurisdiction: Missouri Eastern District Court
• Case Number: 4:24-cv-00980.
• Filing Date: July 30, 2024.
• Outcome or Current Status: Centralized as part of MDL No. 3132 in the Southern District of Iowa as of December 12, 2024.

7. United States District Court for the District of Arizona (Underlying MDL Case)

• Plaintiff(s): Midwest Energy Emissions Corp. (ME2C Environmental), now Birchtech Corp.
• Defendant(s): Tucson Electric Power Co., San Carlos Resources, Inc., Salt River Project Agricultural Improvement and Power District, Tri-State Generation and Transmission Association, Inc., Springerville Unit 3 Holding LLC, and Springerville Unit 3 Partnership LP.
• Jurisdiction: Arizona District Court
• Case Number: 3:24-cv-08145.
• Filing Date: July 30, 2024.
• Outcome or Current Status: Centralized as part of MDL No. 3132 in the Southern District of Iowa as of December 12, 2024.

8. United States District Court for the Western District of Missouri

• Plaintiff(s): Birchtech Corp.
• Defendant(s): Evergy, Inc., Evergy Metro Inc., Evergy Missouri West, Inc., and Evergy Kansas Central, Inc.
• Jurisdiction: Missouri Western District Court
• Case Number: 4:25-cv-00050.
• Filing Date: January 23, 2025.
• Outcome or Current Status: Transferred to the U.S. District Court for the Southern District of Iowa. (Likely part of the ongoing MDL).

Other Cases from Patent Text (Details Unknown from Search Results):
The following cases are listed in the original patent document under "Family has litigation" but specific plaintiff, defendant, filing date, and detailed outcome/status information were not found in the search results to confirm their relation to US10933370B2 or provide full details:

• Kansas District Court: Case Number: 5:25-cv-04033
• Wyoming District Court: Case Number: 2:25-cv-00015
• Wyoming District Court: Case Number: 1:25-cv-00015
• Wisconsin Western District Court: Case Number: 3:25-cv-00026
• Iowa Southern District Court: Case Number: 4:25-cv-00154
• Iowa Southern District Court: Case Number: 4:25-cv-00046
• Iowa Southern District Court: Case Number: 4:25-cv-00037

Note on Patent Expiration:
US Patent 10933370 expired on April 24, 2026. This means that while ongoing litigation for past infringement may continue, new infringement actions cannot be filed for acts occurring after this date.