Transportation refrigeration system comprising a refrigeration unit and a diesel engine
US-11053834-B2 · Jul 6, 2021 · US
injecting substances in exhaust stream
injecting substances in exhaust stream · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F01N3/0293 |
| Official title | {injecting substances in exhaust stream} |
| Display label | injecting substances in exhaust stream |
| Total patents | 125 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 5 |
| 2017 | 6 |
| 2018 | 10 |
| 2019 | 14 |
| 2020 | 17 |
| 2021 | 20 |
| 2022 | 14 |
| 2023 | 22 |
| 2024 | 8 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gas turbine exhaust diffuser with air injection
US-10883387-B2 · Jan 5, 2021 · US
Exhaust gas treatment system and method with four-way catalyzed filter element
US-2020408121-A1 · Dec 31, 2020 · US
Mixing device
US-2020398234-A1 · Dec 24, 2020 · US
Fuel injection device
US-2020400111-A1 · Dec 24, 2020 · US
Fluid for purifying heat engines using stable suspensions of metal colloidal particles, and methods for preparing said fluid
US-10850233-B2 · Dec 1, 2020 · US
Method and system for emission control device heating
US-10844775-B2 · Nov 24, 2020 · US
Method and exhaust treatment system for treatment of an exhaust gas stream
US-10837338-B2 · Nov 17, 2020 · US
Methods and systems for a particulate filter
US-10794309-B2 · Oct 6, 2020 · US
Method for regenerating exhaust gas filter and exhaust gas filter impregnation system
US-2020309003-A1 · Oct 1, 2020 · US
Fluid for purifying heat engines and methods for preparing said fluids by emulsification
US-10774709-B2 · Sep 15, 2020 · US
Tempering system for gas turbine selective catalyst reduction system
US-2020284175-A1 · Sep 10, 2020 · US
Method and system for emission control device heating
US-2020271046-A1 · Aug 27, 2020 · US
Cooling device
US-2020263579-A1 · Aug 20, 2020 · US
Methods and systems for regenerating a particle filter
US-10746067-B2 · Aug 18, 2020 · US
Exhaust gas heating element
US-2020240305-A1 · Jul 30, 2020 · US
Regeneration of a particulate filter or four-way catalytic converter in an exhaust system of an internal combustion engine
US-10724457-B2 · Jul 28, 2020 · US
Method and control unit for operating an internal combustion engine which has a first exhaust-gas purification component and a second exhaust-gas purification component
US-2020123996-A1 · Apr 23, 2020 · US
Regeneration of gasoline particulate filters
US-10570841-B2 · Feb 25, 2020 · US
Dosing module
US-10480374-B2 · Nov 19, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N3/0293?
- CPC F01N3/0293 is the Cooperative Patent Classification code for “injecting substances in exhaust stream.”
- How many patents are filed under CPC F01N3/0293 (injecting substances in exhaust stream)?
- Our database includes 125 publications tagged with this CPC code.
- Is patent activity under CPC F01N3/0293 growing?
- Publication counts under this code: 8 in 2024 vs 3 in 2025 (latest complete years).