Invalidity dossier
US 10343114
Sorbents for the oxidation and removal of mercury
Current assignee: Birchtech Corp
Added 5/14/2026, 6:01:42 AM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Here is a concise summary of US patent 10343114:
US Patent 10343114: Sorbents for the oxidation and removal of mercury
- Title: Sorbents for the oxidation and removal of mercury
- Current Assignee: Birchtech Corp. (Original Assignee: Midwest Energy Emissions Corp.)
- Inventors: Edwin S. Olson, Michael J. Holmes, John H. Pavlish
- Filing Date: May 14, 2018
- Issue Date: July 9, 2019
- Abstract: A promoted carbon and/or non-carbon base sorbent are described that are highly effective for the removal of mercury from flue gas streams. The promoted sorbent comprises a carbon and/or non-carbon base sorbent that has reacted with and contains forms of halogen and halides. Optional components may be added to increase and/or preserve reactivity and mercury capacity.
Plain-Language Overview of Independent Claims:
- Claim 1: This claim describes a promoted sorbent, which can be made of carbon, non-carbon material, or a combination. The sorbent is prepared by reacting a base sorbent structure with a "promoter" (like halogens or halides) to create a product that effectively removes mercury from gas streams.
- Claim 17: This claim covers a method for creating a mercury-removing sorbent. It involves taking a granular base sorbent and reacting it with a promoter (halogens, halides, or combinations) to produce a promoted sorbent that is effective for mercury removal from gas.
- Claim 26: This claim outlines a method for reducing mercury in flue gas. It involves introducing a base sorbent into a mercury-containing flue gas, either by injecting it or creating it in place. This promoted sorbent then captures over 70% of the mercury, resulting in cleaned flue gas, and the promoted sorbent is substantially recovered from this cleaned gas.
- Claim 36: This claim details a method for reducing mercury and ash in a gas stream. It involves injecting promoted sorbent particles (carbon and/or non-carbon) with a mass mean size greater than 40 micrometers into the gas. The mercury is captured by these particles, which are then separated from the ash particles based on their size, and subsequently reinjected into the gas stream.
- Claim 40: This claim describes a method to reduce mercury in gas to a specific level using a carbon base sorbent. It involves reacting the carbon sorbent with a promoter (halogens, halides, or combinations) to make a promoted carbon sorbent. This promoted sorbent then interacts with mercury-containing gas to capture mercury, producing a cleaned gas. The method also includes monitoring the mercury content of the cleaned gas.
- Claim 43: Similar to Claim 40, but this claim focuses on using a non-carbon base sorbent. It involves reacting a non-carbon sorbent with a promoter to create a promoted non-carbon sorbent, allowing it to interact with mercury-containing gas, and monitoring the mercury content of the cleaned gas.
- Claim 46: This claim is a broader method for reducing mercury to a desired level using a base sorbent that can be non-carbon, carbon, or a combination. This base sorbent is reacted with a promoter (halogens, halides, or combinations) to create a promoted sorbent. This promoted sorbent then interacts with mercury-containing gas to capture mercury, producing a cleaned gas, and the mercury content of the cleaned gas is monitored.
CAFC 2026 Dockets:
As of April 26, 2026, a search of CAFC 2026 dockets for patent number US10343114 did not yield any specific results regarding ongoing litigation or appeals directly involving this patent. The search results provided general information about Federal Circuit opinions and case summaries in 2026, primarily discussing Enviro Tech Chemical Services, Inc. v. Safe Foods Corp. concerning US Patent 10,912,321, but no direct mention of US10343114 was found.
Generated 5/16/2026, 6:48:56 PM