Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026
25 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 Tecogen Inc.’s names, not what it holds today.
Patents granted
25
25 utility, 1976 to Dec 31, 2025
Granted in 2025
none
Against 1 in 2024 and none in 2023
Applications published
13
since 2001, to Dec 31, 2025
Names they are printed under
2
its own name
By yearGrantedApplications published
'93'94'05'06'07'13'14'15'16'17'18'19'20'22'24
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
Electrical machinery, apparatus, energy1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name2 counted
Tecogen Inc. its own name
US, as the owner printed on each patent
3 publishedTecogen Inc. its own name
named as the applicant on its applications, in US
10 published
Newest grantseach row opens the USPTO’s own copy
| Granted | Patent | Title | Field | Owner as printed |
|---|
| Mar 19, 2024 | 11,936,327 | Hybrid power system with electric generator and auxiliary power source | Electrical machinery, apparatus, energy | Tecogen Inc. |
| Sep 15, 2020 | 10,774,724 | Dual stage internal combustion engine aftertreatment system using exhaust gas intercooling and charger driven air ejector | Environmental technology | Tecogen Inc. |
| Sep 15, 2020 | 10,774,720 | NOx reduction without urea using a dual stage catalyst system with intercooling in vehicle gasoline engines | Environmental technology | Tecogen Inc. |
| Jun 12, 2018 | 9,995,195 | Emissions control systems and methods for vehicles | Environmental technology | Tecogen Inc. |
| May 1, 2018 | 9,956,526 | Poison-resistant catalyst and systems containing same | Chemical engineering | Tecogen Inc. |
| Jan 2, 2018 | 9,856,767 | Systems and methods for reducing emissions in exhaust of vehicles and producing electricity | Environmental technology | Tecogen Inc. |
| Jul 11, 2017 | 9,702,306 | Internal combustion engine controller | Engines, pumps, turbines | Tecogen Inc. |
| Apr 25, 2017 | 9,631,534 | Assembly and method for reducing nitrogen oxides, carbon monoxide, hydrocarbons and hydrogen gas in exhausts of internal combustion engines and producing an electrical output | Environmental technology | Tecogen Inc. |
| Oct 18, 2016 | 9,470,126 | Assembly and method for reducing ammonia in exhaust of internal combustion engines | Environmental technology | Tecogen Inc. |
| Sep 1, 2015 | 9,121,326 | Assembly and method for reducing nitrogen oxides, carbon monoxide and hydrocarbons in exhausts of internal combustion engines | Environmental technology | Tecogen Inc. |
Newest applications publishedan application is a clue, never a plan
| Published | Application | Title | Field | Owner as printed |
|---|
| Dec 29, 2022 | 2022/0416700 | Hybrid Power System with Electric Generator and Auxiliary Power Source | Electrical machinery, apparatus, energy | Tecogen Inc. · patent 11,936,327 granted from it |
| Aug 1, 2019 | 2019/0234284 | ASSEMBLIES AND METHODS FOR REDUCING PARTICULATE MATTER, HYDROCARBONS, AND GASEOUS OXIDES FROM INTERNAL COMBUSTION ENGINE EXHAUST | Environmental technology | Tecogen Inc. |
| Aug 16, 2018 | 2018/0230886 | ASSEMBLIES AND METHODS FOR REDUCING PARTICULATE MATTER, HYDROCARBONS, AND GASEOUS OXIDES FROM INTERNAL COMBUSTION ENGINE EXHAUST | Environmental technology | Tecogen Inc. |
| Aug 16, 2018 | 2018/0230882 | NOx Reduction Without Urea Using a Dual Stage Catalyst System With Intercooling in Vehicle Gasoline Engines | Environmental technology | Tecogen Inc. · patent 10,774,720 granted from it |
| Jul 26, 2018 | 2018/0207582 | Poison-Resistant Catalyst and Systems Containing Same | Chemical engineering | Tecogen Inc. |
| Oct 5, 2017 | 2017/0284266 | Emissions Control Systems and Methods for Vehicles | Environmental technology | Tecogen Inc. · patent 9,995,195 granted from it |
| Apr 13, 2017 | 2017/0101942 | Internal Combustion Engine Controller | Engines, pumps, turbines | Tecogen Inc. · patent 9,702,306 granted from it |
| Sep 29, 2016 | 2016/0279572 | Poison-Resistant Catalyst and Systems Containing Same | Chemical engineering | Tecogen Inc. · patent 9,956,526 granted from it |
| Mar 17, 2016 | 2016/0076419 | Systems and Methods for Reducing Emissions in Exhaust of Vehicles and Producing Electricity | Environmental technology | Tecogen Inc. · patent 9,856,767 granted from it |
| Sep 10, 2015 | 2015/0252700 | Assembly and Method for Reducing Ammonia in Exhausts of Internal Combustion Engines | Environmental technology | Tecogen Inc. · patent 9,470,126 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.