Method for regenerating a nox storage catalytic converter
US-2016312721-A1 · Oct 27, 2016 · US
Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22)
Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22) · 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 | F01N3/30 |
| Official title | Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22) |
| Display label | Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22) |
| Total patents | 351 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 35 |
| 2016 | 25 |
| 2017 | 23 |
| 2018 | 22 |
| 2019 | 24 |
| 2020 | 40 |
| 2021 | 44 |
| 2022 | 48 |
| 2023 | 33 |
| 2024 | 35 |
| 2025 | 21 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
On-site regeneration method of denitration catalyst in exhaust gas purification system
US-2016305303-A1 · Oct 20, 2016 · US
Method and system for reducing engine exhaust emissions
US-2016305302-A1 · Oct 20, 2016 · US
External air introduction apparatus
US-2016281572-A1 · Sep 29, 2016 · US
Emissions treatment system with lean NOx trap
US-9453443-B2 · Sep 27, 2016 · US
Systems and methods for monitoring the health of a mid-bed oxidant injection system
US-2016273437-A1 · Sep 22, 2016 · US
Actuator for valves in internal combustion engines
US-2016258329-A1 · Sep 8, 2016 · US
Method and an apparatus for warming a catalyst in an internal combustion engine
US-9429057-B2 · Aug 30, 2016 · US
Engine equipped with secondary air supply device
US-9416718-B2 · Aug 16, 2016 · US
Method and system for control of emissions in exhaust aftertreatment system
US-9399965-B2 · Jul 26, 2016 · US
Air-injection system to improve effectiveness of selective catalytic reduction catalyst
US-9376949-B2 · Jun 28, 2016 · US
Engine equipped with secondary air supply device
US-9371769-B2 · Jun 21, 2016 · US
Method and system for control of emissions in exhaust aftertreatment system
US-2016169135-A1 · Jun 16, 2016 · US
Exhaust treatment device of diesel engine
US-9353666-B2 · May 31, 2016 · US
Silencer for mid-bed air injection mixing
US-2016146081-A1 · May 26, 2016 · US
Air dithering for internal combustion engine system
US-9347359-B2 · May 24, 2016 · US
Silencer for mid-bed air injection mixing
US-9347358-B1 · May 24, 2016 · US
Saddle type vehicle
US-9315228-B2 · Apr 19, 2016 · US
Saddle type vehicle
US-9316138-B2 · Apr 19, 2016 · US
Exhaust purification system for internal combustion engine
US-9297288-B2 · Mar 29, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N3/30?
- CPC F01N3/30 is the Cooperative Patent Classification code for “Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22).”
- How many patents are filed under CPC F01N3/30 (Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22))?
- Our database includes 351 publications tagged with this CPC code.
- Is patent activity under CPC F01N3/30 growing?
- Publication counts under this code: 35 in 2024 vs 21 in 2025 (latest complete years).