Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026
68 patents granted to the 2 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to Fuel Tech, Inc.’s names, not what it holds today.
Patents granted
68
68 utility, 1976 to Dec 31, 2025
Granted in 2025
none
Against 1 in 2024 and 2 in 2023
Applications published
36
since 2001, to Dec 31, 2025
Names they are printed under
2
its own name
By yearGrantedApplications published
'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Chemical engineering3
Environmental technology2
Basic materials chemistry1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name2 counted
Fuel Tech, Inc. its own name
US, as the owner printed on each patent. 1 more under the same name are not counted (printed in DE)
33 publishedFuel Tech, Inc. its own name
named as the applicant on its applications, in US
3 published
Newest grantseach row opens the USPTO’s own copy
| Granted | Patent | Title | Field | Owner as printed |
|---|
| Apr 2, 2024 | 11,944,952 | Removing contaminants from water with adsorbents | Chemical engineering | Fuel Tech, Inc. |
| May 9, 2023 | 11,642,634 | Gas saturation of liquids with application to dissolved gas flotation and supplying dissolved gases to downstream processes and water treatment | Chemical engineering | Fuel Tech, Inc. |
| Jan 3, 2023 | 11,542,451 | Water in fuel nanoemulsion and method of making the same | Basic materials chemistry | Fuel Tech, Inc. |
| May 24, 2022 | 11,339,056 | Controlled, compact, on-demand ammonia gas generation process and apparatus | Chemical engineering | Fuel Tech, Inc. |
| May 17, 2022 | 11,332,388 | Removal of selenium from water with kaolinite | Environmental technology | Fuel Tech, Inc. |
| May 17, 2022 | 11,332,387 | Removing arsenic from water with acid-activated clay | Environmental technology | Fuel Tech, Inc. |
| Feb 5, 2019 | 10,197,272 | Process and apparatus for reducing acid plume | Environmental technology | Fuel Tech, Inc. |
| Jan 1, 2019 | 10,166,507 | Process for hydrochloric acid mediation | Environmental technology | Fuel Tech, Inc. |
| Nov 13, 2018 | 10,124,288 | Controlling injection of magnesium oxide for controlling SO3 with enhanced boiler efficiency | Environmental technology | Fuel Tech, Inc. |
| Oct 31, 2017 | 9,802,154 | Process for sulfur dioxide, hydrochloric acid and mercury mediation | Chemical engineering | Fuel Tech, Inc. |
Newest applications publishedan application is a clue, never a plan
| Published | Application | Title | Field | Owner as printed |
|---|
| Aug 17, 2023 | 2023/0256405 | Channel Manifold | Chemical engineering | Fuel Tech, Inc. |
| Dec 8, 2022 | 2022/0387966 | REMOVING CONTAMINANTS FROM WATER WITH ADSORBENTS | Chemical engineering | Fuel Tech, Inc. · patent 11,944,952 granted from it |
| Sep 16, 2021 | 2021/0283557 | Gas Saturation of Liquids with Application to Dissolved Gas Flotation and Supplying Dissolved Gases to Downstream Processes and Water Treatment | Chemical engineering | Fuel Tech, Inc. · patent 11,642,634 granted from it |
| Feb 25, 2021 | 2021/0053845 | Removal of Selenium from Water with Kaolinite | Environmental technology | Fuel Tech, Inc. · patent 11,332,388 granted from it |
| Jan 2, 2020 | 2020/0002189 | Removing Arsenic from Water with Acid-Activated Clay | Environmental technology | Fuel Tech, Inc. · patent 11,332,387 granted from it |
| Feb 7, 2019 | 2019/0040577 | DEPOSIT CONTROL FOR A BLACK LIQUOR RECOVERY BOILER | Textile and paper machines | Fuel Tech, Inc. · patent 11,008,704 granted from it |
| Nov 15, 2018 | 2018/0327683 | Controlling Slagging and/or Fouling in Furnaces Burning Biomass | Basic materials chemistry | Fuel Tech, Inc. |
| Nov 1, 2018 | 2018/0312773 | Controlling Slagging and/or Fouling in Furnaces Burning Biomass | Basic materials chemistry | Fuel Tech, Inc. |
| Jul 12, 2018 | 2018/0194639 | CONTROLLED, COMPACT, ON-DEMAND AMMONIA GAS GENERATION PROCESS AND APPARATUS | Chemical engineering | Fuel Tech, Inc. · patent 11,339,056 granted from it |
| Mar 30, 2017 | 2017/0089572 | Process and Apparatus for Reducing Acid Plume | Environmental technology | Fuel Tech, Inc. · patent 10,197,272 granted from it |
A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.