Patent 10589225

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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PTAB activity (2)

AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.

  • IPR2025-01323IPRfiled Jul 18, 2025vs. UNION ELECTRIC COMPANY et al.Discretionary Denial
  • IPR2025-00425IPRfiled Mar 4, 2025vs. PacifiCorp et al.Institution Denied

Cached for 24 hours. Status strings are sourced verbatim from the PTAB API; the colored badge is our heuristic classification.

Cases on file (8)

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Specific litigation cases in our database that name US patent 10589225. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

✓ Generated

The provided patent text and search results indicate that US patent 10589225 has been involved in several litigation cases, primarily district court patent infringement lawsuits and Inter Partes Review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB). Birchtech Corp., formerly Midwest Energy Emissions Corp., is the patent owner.

Here is a summary of the known litigation:

District Court Cases:

  1. Plaintiff(s): Midwest Energy Emissions Corp. and Birchtech Corp.

    • Defendant(s): Evergy, Inc., Evergy Metro, Inc., Evergy Missouri West, Inc., Evergy Kansas Central, Inc. (Evergy, Inc. dismissed without prejudice, claims against Evergy Kansas Central, Inc. transferred to District of Kansas).
    • Jurisdiction: U.S. District Court for the Southern District of Iowa, later transferred to the District of Kansas and eventually consolidated into MDL No. 4:24-md-3132.
    • Case Number: 4:2025cv00046 (initially); 5:2025cv04033 (transferred to Kansas); 4:2025cv00154 (reassigned in Iowa, then consolidated).
    • Filing Date: February 6, 2025 (initial filing in S.D. Iowa).
    • Status: Consolidated into MDL No. 4:24-md-3132 (In Re: Midwest Energy Emissions Corp. Patent Litigation) in the Southern District of Iowa.

  2. Plaintiff(s): Midwest Energy Emissions Corp. (n/k/a Birchtech Corp.)

    • Defendant(s): Berkshire Hathaway Energy Company et al., including Interstate Power and Light Company, MidAmerican Energy Company, PacifiCorp, and Wisconsin Power and Light Company.
    • Jurisdiction: U.S. District Court for the Southern District of Iowa, with cases against PacifiCorp and Wisconsin Power and Light Company transferred to the District of Wyoming and Western District of Wisconsin, respectively. Consolidated into MDL No. 4:24-md-3132.
    • Case Number: 4:24-cv-00243 (S.D. Iowa); 2:25-cv-00015 (D. Wyoming); 3:25-cv-00026 (W.D. Wisconsin).
    • Filing Date: Not explicitly stated for each individual case, but 4:24-cv-00243 implies a 2024 filing, and 2:25-cv-00015 and 3:25-cv-00026 imply 2025 filings.
    • Status: Consolidated into MDL No. 4:24-md-3132.

  3. Plaintiff(s): Midwest Energy Emissions Corp. et al.

    • Defendant(s): Arthur J. Gallagher & Co. et al.
    • Jurisdiction: U.S. District Court for the District of Delaware.
    • Case Number: 1:19-cv-01334.
    • Filing Date: Implied to be 2019 by the case number.
    • Status: Ongoing.

  4. Plaintiff(s): Midwest Energy Emissions Corp.

    • Defendant(s): Ameren Corporation et al.
    • Jurisdiction: U.S. District Court for the Eastern District of Missouri.
    • Case Number: 4:24-cv-00980.
    • Filing Date: Implied to be 2024 by the case number.
    • Status: Consolidated into MDL No. 4:24-md-3132.

  5. Plaintiff(s): Midwest Energy Emissions Corp.

    • Defendant(s): Tucson Electric Power Company et al.
    • Jurisdiction: U.S. District Court for the District of Arizona.
    • Case Number: 3:24-cv-08145.
    • Filing Date: Implied to be 2024 by the case number.
    • Status: Consolidated into MDL No. 4:24-md-3132.

PTAB Inter Partes Review (IPR) Cases:

  1. Petitioner: Unified Patents Inc. (It is possible this refers to a different patent, as details directly linking to 10589225 were not explicit in the Unified Patents search results for the given IPRs, but the patent text explicitly mentions IPRs for 10589225. I will list IPRs where 10589225 is explicitly mentioned.)

  2. Petitioner: Berkshire Hathaway Energy Company, et al.

    • Patent Owner: Birchtech Corp. f/k/a Midwest Energy Emissions Corp.
    • Case Number: IPR2025-00424.
    • Filing Date: Not explicitly stated in search results, but year indicates 2025.
    • Status: Pending - Instituted.

  3. Petitioner: Berkshire Hathaway Energy Company, et al.

    • Patent Owner: Birchtech Corp. f/k/a Midwest Energy Emissions Corp.
    • Case Number: IPR2025-00425.
    • Filing Date: Not explicitly stated in search results, but year indicates 2025.
    • Status: Pending - Instituted.

Multidistrict Litigation (MDL):

  • Case Name: In Re: Midwest Energy Emissions Corp. Patent Litigation.
  • Jurisdiction: U.S. District Court for the Southern District of Iowa.
  • Case Number: 4:24-md-03132.
  • Filing Date: Implied to be 2024 by the case number.
  • Status: Ongoing; consolidates several district court cases involving this patent and related patents.

CAFC Dockets:
A search for US patent 10589225 in the CAFC 2026 dockets did not return any direct results as of April 26, 2026. This indicates no active appeals related to this specific patent number in the Court of Appeals for the Federal Circuit for the year 2026. However, ongoing PTAB and district court cases could lead to future CAFC appeals.

Generated 5/20/2026, 12:48:03 PM