Systems and methods for reducing aftertreatment system nox emissions
US-2022412278-A1 · Dec 29, 2022 · US
Electrically driven air pumps
Electrically driven air pumps · 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 | F01N3/323 |
| Official title | {Electrically driven air pumps} |
| Display label | Electrically driven air pumps |
| Total patents | 94 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 6 |
| 2017 | 12 |
| 2018 | 6 |
| 2019 | 10 |
| 2020 | 8 |
| 2021 | 4 |
| 2022 | 11 |
| 2023 | 18 |
| 2024 | 10 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Engine assembly and method
US-11525389-B2 · Dec 13, 2022 · US
Methods and systems for reducing engine exhaust emissions
US-2022298946-A1 · Sep 22, 2022 · US
Engine off selective catalytic reduction catalyst loading
US-11391192-B1 · Jul 19, 2022 · US
Catalyst light off using purge fuel and e-booster
US-11261770-B1 · Mar 1, 2022 · US
Diagnostic method and device for checking the functionality of a component for exhaust-gas aftertreatment
US-11236659-B2 · Feb 1, 2022 · US
Method for operating an internal combustion engine with a secondary air system
US-11220945-B2 · Jan 11, 2022 · US
Engine assembly and method
US-2021355862-A1 · Nov 18, 2021 · US
Method for Operating an Internal Combustion Engine with a Secondary Air System
US-2021348539-A1 · Nov 11, 2021 · US
Diagnostic method and device for checking the functionality of a component for exhaust-gas aftertreatment
US-2021189941-A1 · Jun 24, 2021 · US
Exhaust gas system with preconditioning
US-10989084-B2 · Apr 27, 2021 · US
Method and system for emission control device heating
US-10844775-B2 · Nov 24, 2020 · US
Engine system having secondary air injection device
US-10844780-B2 · Nov 24, 2020 · US
Internal combustion engine exhaust pipe fluidic purger system
US-2020340386-A1 · Oct 29, 2020 · US
Fluid pump control unit
US-2020309154-A1 · Oct 1, 2020 · US
Method and system for emission control device heating
US-2020271046-A1 · Aug 27, 2020 · US
Injection controller
US-10753256-B2 · Aug 25, 2020 · US
Exhaust gas system with preconditioning
US-2020165949-A1 · May 28, 2020 · US
Methods and systems for removing moisture from engine exhaust system
US-10598060-B2 · Mar 24, 2020 · US
Systems and methods for particulate filter regeneration
US-10513958-B2 · Dec 24, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N3/323?
- CPC F01N3/323 is the Cooperative Patent Classification code for “Electrically driven air pumps.”
- How many patents are filed under CPC F01N3/323 (Electrically driven air pumps)?
- Our database includes 94 publications tagged with this CPC code.
- Is patent activity under CPC F01N3/323 growing?
- Publication counts under this code: 10 in 2024 vs 2 in 2025 (latest complete years).