Exhaust gas control system for internal combustion engine
US-2017350294-A1 · Dec 7, 2017 · US
by using absorbents or adsorbents
by using absorbents or adsorbents · 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 | F01N3/0807 |
| Official title | {by using absorbents or adsorbents} |
| Display label | by using absorbents or adsorbents |
| Total patents | 243 |
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 | 29 |
| 2016 | 14 |
| 2017 | 26 |
| 2018 | 25 |
| 2019 | 27 |
| 2020 | 20 |
| 2021 | 26 |
| 2022 | 31 |
| 2023 | 16 |
| 2024 | 16 |
| 2025 | 10 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust gas purifying system
US-9810120-B2 · Nov 7, 2017 · US
Exhaust-gas aftertreatment device for an internal combustion engine, and method for heating an exhaust-gas aftertreatment device
US-9797284-B2 · Oct 24, 2017 · US
IN-EXHAUST ELECTRICAL ELEMENT FOR NOx STORAGE CATALYST AND SCR SYSTEMS
US-2017284250-A1 · Oct 5, 2017 · US
Exhaust gas aftertreatment device for an internal combustion engine
US-2017276050-A1 · Sep 28, 2017 · US
Emissions treatment system with ammonia-generating and scr catalysts
US-2017241313-A1 · Aug 24, 2017 · US
System and method for managing contaminant storage in a storage catalyst
US-2017226911-A1 · Aug 10, 2017 · US
Reduction of N2O in the exhaust gas of lean-burn petrol engines
US-9719446-B2 · Aug 1, 2017 · US
Method for regenerating lean NOx trap of exhaust purification system provided with lean NOx trap and selective catalytic reduction catalyst and exhaust purification system
US-9702310-B2 · Jul 11, 2017 · US
Diesel Oxidation Catalyst Having a Capture Region for Exhaust Gas Impurities
US-2017151532-A1 · Jun 1, 2017 · US
Emissions treatment system with ammonia-generating and SCR catalysts
US-9662611-B2 · May 30, 2017 · US
Silencer, exhaust valve, valve device, air dryer, compressed air supply device for vehicle, and compressed air supply system
US-9649588-B2 · May 16, 2017 · US
Diesel oxidation catalyst and exhaust system
US-9636634-B2 · May 2, 2017 · US
Deterioration diagnosis device for an exhaust gas purification apparatus
US-9617900-B2 · Apr 11, 2017 · US
Method for the operation of an exhaust gas aftertreatment system
US-2017096921-A1 · Apr 6, 2017 · US
Exhaust system comprising a passive nox adsorber
US-2017096922-A1 · Apr 6, 2017 · US
METHOD FOR REGENERATING LEAN NOx TRAP OF EXHAUST PURIFICATION SYSTEM PROVIDED WITH LEAN NOx TRAP AND SELECTIVE CATALYTIC REDUCTION CATALYST AND EXHAUST PURIFICATION SYSTEM
US-2017074191-A1 · Mar 16, 2017 · US
Silencer, exhaust valve, valve device, air dryer, compressed air supply device for vehicle, and compressed air supply system
US-2016339378-A1 · Nov 24, 2016 · US
Passive nox adsorber
US-2016279598-A1 · Sep 29, 2016 · US
Emissions treatment system with lean NOx trap
US-9453443-B2 · Sep 27, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N3/0807?
- CPC F01N3/0807 is the Cooperative Patent Classification code for “by using absorbents or adsorbents.”
- How many patents are filed under CPC F01N3/0807 (by using absorbents or adsorbents)?
- Our database includes 243 publications tagged with this CPC code.
- Is patent activity under CPC F01N3/0807 growing?
- Publication counts under this code: 16 in 2024 vs 10 in 2025 (latest complete years).